Malicious PDF — malware analysis report

Static analysis result for SHA-256 738ae689f4d77962…

MALICIOUS

PDF

80.0 KB Created: 2021-06-29 08:00:15 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-08-20
MD5: f50fb5d936775bf32dc571b52f1dd53c SHA-1: 1657c67b26ea9c1632a01d6ae6a8be9ed2410cad SHA-256: 738ae689f4d77962d98c65019ca7effed3727ad60ce54c702a936d3e13003ecc
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

This PDF file was flagged by ClamAV as a phishing trojan and by an ML classifier as malicious. It contains numerous embedded URLs, many pointing to compromised WordPress sites or disposable hosting, suggesting it's designed to lead users to malicious content or phishing pages. The document's structure and URL distribution align with a link farm attack pattern.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9960

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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://inwebjor.ru/uplcv?utm_term=how+to+create+a+d%26d+character+backstory PDF link annotation
    • https://mariellatriolo.it/public/file/40382374156.pdfIn PDF document text
    • http://www.rebranded.tv/wp-content/plugins/formcraft/file-upload/server/content/files/1607f7925cb266---28531622570.pdfIn PDF document text
    • https://ehotelgateway.com/bot/ckfinder/uf/files/munegukupupona.pdfIn PDF document text
    • https://quickonboarding.com/wp-content/plugins/super-forms/uploads/php/files/6f300a96d4aca5b49710870bc9f055c6/97707782734.pdfIn PDF document text
    • https://www.reliancecareuk.com/wp-content/plugins/super-forms/uploads/php/files/4e07bba37a041a983ccc8e9ec059219b/1780955333.pdfIn PDF document text
    • https://agenciaboom.com/wp-content/plugins/super-forms/uploads/php/files/h96o6j44g0ia5ci24v0a0f7mc1/3290714450.pdfIn PDF document text
    • https://laxmigrouppune.com/wp-content/plugins/super-forms/uploads/php/files/6817714cdcfa47133efff28792d9aeb1/datikez.pdfIn PDF document text
    • http://asesorgubernamental.com/images/file/33054754654.pdfIn PDF document text
    • http://www.danvillern.com/wp-content/plugins/super-forms/uploads/php/files/seil4j90ls0g2nu6fbmbdh6ro5/funixor.pdfIn PDF document text
    • https://www.surajinformatics.com/wp-content/plugins/super-forms/uploads/php/files/7280b06401697203cbbec809733eab6f/vozemefevezobagojizos.pdfIn PDF document text
    • http://mbcasc.net/imgs/file/41349245001.pdfIn PDF document text
    • http://jump360.co/upload/files/20210614082902.pdfIn PDF document text
    • http://xboxheerlen.nl/userfiles/file/xarofuk.pdfIn PDF document text
    • https://seataclighting.com/wp-content/plugins/super-forms/uploads/php/files/4fd625ab2c03a91674907624a8f9b1be/nepimevej.pdfIn PDF document text
    • http://nc2e.fr/wp-content/plugins/formcraft/file-upload/server/content/files/160942de4d2a19---majiwinaberidazusevixo.pdfIn PDF document text
    • http://www.jimenez-casquet.com/wp-content/plugins/formcraft/file-upload/server/content/files/16078d8391bb1b---xafajazomawe.pdfIn PDF document text
    • https://ifacemount.com/wp-content/plugins/super-forms/uploads/php/files/3hhv7jr5mo9a6uv0beg7butj1d/53934335189.pdfIn PDF document text
    • http://math-talk.kr/wp-content/plugins/super-forms/uploads/php/files/npo1pd38c6ktfqco0l6hki62e0/32676984261.pdfIn PDF document text
    • http://profisystem.ro/wp-content/plugins/formcraft/file-upload/server/content/files/1607a11f14715a---12166049504.pdfIn PDF document text
    • http://az4group.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/1607594b8a2ecf---xutizepof.pdfIn PDF document text
    • http://easternsheep.by/app/upload/file/dazebikelixubosugoroz.pdfIn PDF document text
    • https://refundsrefunds.com/wp-content/plugins/formcraft/file-upload/server/content/files/160899ba45ec2e---ranomemotod.pdfIn PDF document text
    • http://aiswaryamatrimonials.com/fck_uploads/file/tojuzovetubale.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

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000d845.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD845 10028 bytes
SHA-256: f3dc59fd8a667cbda206323ff273e2e29cfcbcb77056237fa63ff5fbe7878b91
font_01_sfnt_off0000eeaf.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEEAF 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off000106c1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x106C1 16912 bytes
SHA-256: 8b49036d0f6761343b2806d969768e6f73ef4d11532ae4d44b2b08e335644d68

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