Malicious PDF — malware analysis report

Static analysis result for SHA-256 fd67d6ae67ba9eaa…

MALICIOUS

PDF

105.6 KB Created: 2021-03-28 12:18:12 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-23
MD5: 861c2d4975ab3a505c14e053587058f3 SHA-1: 9e1b448f2e15014b67a9b204819ff08dd24d0e3c SHA-256: fd67d6ae67ba9eaac06149e86f4d3e35585021d97c62aa395259b57281fb0891
126 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

This PDF document was flagged as malicious by ClamAV and an ML classifier. The file embeds a large number of external links characteristic of an SEO link farm. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9949

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://xezojetit.ru/award?keyword=beginner+gym+workout+program+pdf PDF link annotation
    • http://jatasirok.22web.org/lodalujaferafenowen.pdfIn PDF document text
    • http://fartook.online/arc_hydro_groundwater_tools_freel57ng.pdfIn PDF document text
    • http://kofodotig.sportsontheweb.net/99362269405.pdfIn PDF document text
    • http://santaparker.store/gotigulewokuhn1qn.pdfIn PDF document text
    • http://ritual-venki.online/jumidafajaruffvfxi.pdfIn PDF document text
    • https://cdn.sqhk.co/sabepakofo/gbBMKZH/paylink_generator_for_paypal.pdfIn PDF document text
    • https://cdn.sqhk.co/gofejenizew/Aiihfes/96046288024.pdfIn PDF document text
    • https://cdn.sqhk.co/baxotonad/j7htJje/levukapakuzexepevutud.pdfIn PDF document text
    • http://grenkasalo4.xyz/85966313541ffu9c.pdfIn PDF document text
    • http://minuette.me/ninezafek38pvk.pdfIn PDF document text
    • https://cdn.sqhk.co/letonolomo/ShjjgHJ/65258821938.pdfIn PDF document text
    • http://rejorevubirobu.sportsontheweb.net/zapusuvaxonezigivubeze.pdfIn PDF document text
    • http://rumafelaneli.mygamesonline.org/kuwowuxatopiv.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://kofaxafogi.myartsonline.com/whats_the_oldest_biblical_text.pdfIn PDF document text
    • https://bef89f6e-6323-4b84-ad9d-a44490bfcc4f.filesusr.com/ugd/96768c_b9a84dc79b824a0c8a4a78da2ef7cfdf.pdf?index=trueIn PDF document text
    • http://bakadukepafim.epizy.com/5849861388.pdfIn PDF document text
    • http://rewezaxow.epizy.com/57076081869.pdfIn PDF document text
    • https://933527c5-e005-4225-a3aa-05fee46c7696.filesusr.com/ugd/b51dd5_cfe6f017e7da487592e941b5cd181433.pdf?index=trueIn PDF document text
    • https://7be8961d-effb-4c78-a255-78c3c9f0be09.filesusr.com/ugd/3dd68e_ef48c8dd615d4093bfd277ce8f2f2a4f.pdf?index=trueIn PDF document text
    • https://d9226533-59f4-4737-ae77-cfa9cdee5378.filesusr.com/ugd/d7c203_49ae7fe1aa4740a78d0e40e13d6dd463.pdf?index=trueIn PDF document text
    • https://68f2566a-c586-4d15-a5d1-3a72044c38f3.filesusr.com/ugd/ecec20_2bd2bafe85ec4b10a20a83a08879624f.pdf?index=trueIn PDF document text
    • https://8271b8e8-1520-4b18-8785-2fafc8cd33e6.filesusr.com/ugd/efc97f_9395d979f3564e84bd7257f3cffa7ac8.pdf?index=trueIn PDF document text
    • http://didopip.epizy.com/blood_donation_registration_form_template.pdfIn PDF document text
    • https://ecfc1f44-6648-4072-bff5-6ee4adcfbe4f.filesusr.com/ugd/e5a943_494b78657f73478ab5802e8b840f085f.pdf?index=trueIn PDF document text
    • https://02ee9779-94d6-4ec7-959f-c0f99fe19a35.filesusr.com/ugd/cdc607_d4c81dcc4ef14414a31d61f880155ceb.pdf?index=trueIn PDF document text
    • https://ab2ac9d4-4772-4872-829d-c19fde0a4f90.filesusr.com/ugd/b919b3_6c19080eaee44fdd80210710e9c5f0bf.pdf?index=trueIn PDF document text
    • http://pezamax.myartsonline.com/baikal_mp_155_manual.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://scripts.sil.org/OFLIn PDF document text

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00015cdd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x15CDD 5460 bytes
SHA-256: 25ef00a4cf5d768c8340668710ec7616149099daa91a760da9f9a21b2827b718
font_01_sfnt_off00016f82.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x16F82 11608 bytes
SHA-256: 1a03875fca2f05b9b5dc923cd03afc278deb7df26f13e6ab44aed4a431b35a2a

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