Malicious PDF — malware analysis report

Static analysis result for SHA-256 71ac9ec6ee363297…

MALICIOUS

PDF

104.7 KB Created: 2021-07-07 11:58:19 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-08-25
MD5: 09e0fa3adc16a72ad0a0b749d98d28a3 SHA-1: b4dc0168bcd05d74af239e4ea39aa3304b5ce04d SHA-256: 71ac9ec6ee363297828726a7ba59a15cd06666f99523e027a7c0e0b527d8f9bc
164 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF contains embedded JavaScript and a large number of external URIs, many hosted on compromised or disposable domains, indicating a link farm designed to redirect users to malicious sites. The ClamAV detection and ML classifier strongly suggest this PDF is malicious, likely serving as a phishing lure or a distribution point for further malware. The embedded JavaScript is likely used to facilitate the redirection or obfuscate the malicious links.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9847

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
  • 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.
  • Embedded JS stream low PDF_JS
    PDF references a /JS stream. Generic JavaScript is common in benign forms; specific dangerous APIs are scored by separate rules.
  • 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://pixomot.ru/uplcv?utm_term=the+definition+of+alien PDF link annotation
    • http://www.petersmetalstitching.co.za/wp-content/plugins/formcraft/file-upload/server/content/files/16086eb3b155c0---nasogediteverumetixotike.pdfIn PDF document text
    • http://4grd.com/cmsimages/file/40327843515.pdfIn PDF document text
    • https://baconbites.com/wp-content/plugins/super-forms/uploads/php/files/i0qtpnnn7v9lqenbh2jmjkpf16/larafona.pdfIn PDF document text
    • https://lakecountyoralsurgery.com/wp-content/plugins/formcraft/file-upload/server/content/files/16080f3b92cd41---37887448674.pdfIn PDF document text
    • https://www.grandeprairie.org/wp-content/plugins/formcraft/file-upload/server/content/files/160980c4f0af99---5235337325.pdfIn PDF document text
    • https://agrocare.ro/ckfinder/userfiles/files/guvujetitimirudizodugas.pdfIn PDF document text
    • http://www.ferm-matic.fr/upload/file/keruw.pdfIn PDF document text
    • http://amctop.com/board_data/editor_img/file/202105250544.pdfIn PDF document text
    • http://taketty.xyz/js/ckfinder/userfiles/files/51963562141.pdfIn PDF document text
    • http://scholl2021.com/clients/1/19/19bca4f76d5065ca3bffbfc1c67e7925/File/jekawozifawoxase.pdfIn PDF document text
    • http://architects-desk.com/uploadsfile/zutikobufuwi.pdfIn PDF document text
    • https://adiwirawanbali.com/wp-content/plugins/super-forms/uploads/php/files/dd1c1a73f5a1bddc4ceb4cf6d6369a1b/saxuxon.pdfIn PDF document text
    • https://andymullinscommercial.com/home/andy/public_html/ckfinder/userfiles/files/66185186994.pdfIn PDF document text
    • http://vdgairconditioning.nl/wp-content/plugins/formcraft/file-upload/server/content/files/1607e7997afd52---59075951930.pdfIn PDF document text
    • https://vieclambaohiem24h.com/upload/files/sipekiwowolawipaja.pdfIn PDF document text
    • http://wittlich-luexem.de/userfiles/file/mozadisafon.pdfIn PDF document text
    • http://thebookmarkcafe.com/uploads/files/madewixiripuvigonim.pdfIn PDF document text
    • http://finsura-lifedirect.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/16097b7719ad47---6317698431.pdfIn PDF document text
    • https://www.femregenx.co.za/wp-content/plugins/super-forms/uploads/php/files/h9k9r3qmf4egm95c5ef6lcldb8/92771450759.pdfIn PDF document text
    • https://www.straightmyteeth.com/wp-content/plugins/super-forms/uploads/php/files/25e04f062d5e0714961e6a835affe016/wefabapu.pdfIn PDF document text
    • https://husvagnsexpo.se/wp-content/plugins/formcraft/file-upload/server/content/files/160869655d0cea---rewesarop.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 5

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_006_off0001725d.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x1725D 20040 bytes
SHA-256: bf7b95e1162951b9574687f569080604e37b810727d88fd315c749e81e669e5c
font_00_sfnt_off0000ee1d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEE1D 10144 bytes
SHA-256: d105688b07cec753c551882652a18bc73f4047e74175dd205f6ebc28cb70e7a8
font_01_sfnt_off000104b2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x104B2 29288 bytes
SHA-256: 968e1bfc4d7807c5482933dd0c720c0d4b99f95dfab0267ab5510c25bb5bbfd7
font_02_sfnt_off00014931.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x14931 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_03_sfnt_off0001613e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1613E 4808 bytes
SHA-256: 1fb0fa49dd478cffbe7a16f3c867de6a2cbf2e0b57b45b2984f0431d6ba73100

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