Malicious PDF — malware analysis report

Static analysis result for SHA-256 1c54b1f32707f7c7…

MALICIOUS

PDF

92.7 KB Created: 2021-07-01 13:06:40 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-09-13
MD5: cd5cd012b0f0161c7b5e9ada41013e00 SHA-1: a5f765a6433f15cad96491fec845b1a1e163bd2e SHA-256: 1c54b1f32707f7c728c108988549550c51b02042f9ed53863c22d0d05444446f
196 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.001 User Execution: Malicious Link

This PDF file was detected as malicious by ClamAV and exhibits characteristics of a credential phishing campaign. It impersonates Amazon and contains numerous links, including one hosted on `huntic.ru`, which likely directs users to a fake login page. The presence of multiple links on compromised WordPress sites further supports the phishing lure.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9942

Heuristics 7

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • Brand-impersonation credential phishing lure high SE_BRAND_CREDENTIAL_PHISH
    Document impersonates a well-known consumer brand and uses account-security / verification language ('unusual activity', 'account on hold', 'verify your account') to steer the reader to a credential-harvesting link. Corroborated by: call-to-action link host does not match the impersonated brand: https://huntic.ru/uplcv?utm_term=othello+study+questions+answers.
  • PDF link farm points to compromised-WordPress upload storage medium PDF_COMPROMISED_CMS_UPLOAD_LINK_FARM
    PDF contains multiple clickable links, across many distinct hosts, whose targets are random-slug files parked in the upload directories of vulnerable WordPress form plugins (FormCraft, Super Forms). This is the hallmark of the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains hosted on compromised sites. The PDF itself carries no exploit — the risk is the linked destinations.
  • Small PDF is a non-clustered link farm on disposable hosting medium PDF_SEO_DISPOSABLE_LINK_FARM
    Small PDF contains many clickable external PDF links spread thin across many distinct hosts (no single dominant host), corroborated by a utm_term SEO-redirector link and/or links parked on free/disposable content hosts. This is the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains, rather than a normal document citation pattern. The PDF itself carries no exploit — the risk is the linked destinations.
  • External URI info PDF_URI
    PDF contains an external URL action
  • Object number defined twice with different bodies info PDF_DUPLICATE_OBJ_BODY_INCREMENTAL
    The same indirect object (N G) is defined more than once with different body bytes. First-wins and last-wins readers will resolve different content, which is a parser-confusion shape used by targeted PDFs. Body-only differences are common in benign incremental updates, so severity is raised only when the duplicate carries active content.
  • Embedded URL info EMBEDDED_URL
    One or more URLs were extracted from the document. The URL itself is not a detection — see the per-URL labels for which channel (macro, JS, link annotation, document body, ...) reached each URL.
    URL https://huntic.ru/uplcv?utm_term=othello+study+questions+answers PDF link annotation
    • https://www.herewardcarpets.co.uk/wp-content/plugins/super-forms/uploads/php/files/pvukr75de0fliend5djkj0teg0/6629845342.pdfIn PDF document text
    • http://ttccid.com/userfiles/files/tanuresesilidafawufuz.pdfIn PDF document text
    • https://vinisfarm.com/wp-content/plugins/super-forms/uploads/php/files/c5320f513d15a5e9a200f5a7944245e0/21868321648.pdfIn PDF document text
    • https://swotin.com/wp-content/plugins/formcraft/file-upload/server/content/files/16088bfd08c3cb---48089295538.pdfIn PDF document text
    • http://itssilvertime.com/clients/2/24/24efe347a73a8ce028152bf895bc11a7/File/22138808529.pdfIn PDF document text
    • https://visaonline-vn.com/wp-content/plugins/super-forms/uploads/php/files/knqafht60u7c9efunbp043nqve/56760980273.pdfIn PDF document text
    • https://amartzon.store/wp-content/plugins/super-forms/uploads/php/files/65052fddb131892b9a39b025e33cfc40/98886137692.pdfIn PDF document text
    • http://www.johnknox.ch/wp-content/plugins/formcraft/file-upload/server/content/files/160a6698756245---73702741621.pdfIn PDF document text
    • https://udachi.co.th/wp-content/plugins/super-forms/uploads/php/files/6mve95frvnhgeuebbm4q5o5mc4/72677451691.pdfIn PDF document text
    • http://outspokenholland.com/userfiles/fckFile/20210618171224.pdfIn PDF document text
    • http://www.musicmaestrodiscos.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/16078dc0f58b1c---kumepoxaseweka.pdfIn PDF document text
    • https://www.cir.cloud/wp-content/plugins/formcraft/file-upload/server/content/files/16072fa1cc0947---43220579185.pdfIn PDF document text
    • https://www.democratum.com/wp-content/plugins/super-forms/uploads/php/files/cd4b29a73d1a6c5279db3d7ccca4fd9d/79269560977.pdfIn PDF document text
    • https://www.criteriainvest.com.br/wp-content/plugins/super-forms/uploads/php/files/9f2tdl5jn1dbu2l3aml8r73m93/xuvokunebovesopofolazifuj.pdfIn PDF document text
    • http://conflictfreeelectronics.com/ourprojects/chowki/UserFiles/renuka/file/42873074289.pdfIn PDF document text
    • https://moto-trend.cz/public/files/fck/file/70060582969.pdfIn PDF document text
    • https://f1com.ge/wp-content/plugins/super-forms/uploads/php/files/14e7e0742b2e193434ffc70982b7131c/73513025620.pdfIn PDF document text
    • https://creationstationdance.com/wp-content/plugins/formcraft/file-upload/server/content/files/160929f4ef33de---15463630703.pdfIn PDF document text
    • http://auto-spec.ca/fck/file/8686797640.pdfIn PDF document text
    • http://www.jcca.co.in/wp-content/plugins/formcraft/file-upload/server/content/files/160b572a3491a0---goxatibenigu.pdfIn PDF document text
    • https://mosoptagro.ru/wp-content/plugins/super-forms/uploads/php/files/41b430d8ab7035c0196d252f57868085/92636918310.pdfIn PDF document text
    • http://aranykoronakft.hu/userfiles/file/kiwumiwov.pdfIn PDF document text
    • https://interesttour.com/wp-content/plugins/super-forms/uploads/php/files/afbf2d3867185dac8fc32fed46f2b47f/mipevekawisowubovokap.pdfIn PDF document text
    • https://humanistbeauty.com/wp-content/plugins/super-forms/uploads/php/files/j5tad8568g0v36mao3k3ofrti9/5087079170.pdfIn PDF document text
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#In PDF document text
    • http://purl.org/dc/elements/1.1/In PDF document text
    • http://ns.adobe.com/pdf/1.3/In PDF document text
    • http://ns.adobe.com/xap/1.0/In PDF document text
    • http://ns.adobe.com/xap/1.0/mm/In PDF document text
    • http://ns.adobe.com/xap/1.0/rights/In PDF document text
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Related samples 8

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000107f0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x107F0 17100 bytes
SHA-256: 5c812b00d5acabae24728e2616a48e1011bf452fb5d7d3736fc84ccf58198cad
font_01_sfnt_off00013474.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13474 10816 bytes
SHA-256: 4f02b7d3e44689f987e13a88a4845328b7d715e2768ab69084e9c0fe12ae58ce
font_02_sfnt_off00014d40.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x14D40 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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