Malicious PDF — malware analysis report

Static analysis result for SHA-256 582164992e85384a…

MALICIOUS

PDF

68.9 KB Created: 2021-04-02 19:18:04 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-23
MD5: c2a71428167cd9563e43a3f8b74e31c6 SHA-1: 9ea7d4918f2df85aaaf340021af88d29d4c816b5 SHA-256: 582164992e85384a1eb8425073d12bfb4691a6f097e3d979d399b551c081d7e4
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 0.9997

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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://ponafet.ru/award?keyword=rock+characterization+testing+and+monitoring+pdf PDF link annotation
    • http://wirelessinfo.ru/wutakibisuwilop9o6.pdfIn PDF document text
    • http://zhigina.ru/house_of_fun_free_coins_generatorahb6h.pdfIn PDF document text
    • https://dikasawo.weebly.com/uploads/1/3/5/3/135349802/8692123.pdfIn PDF document text
    • http://ig-soft-team.com/free_game_frontline_commando_mod_apkl2inu.pdfIn PDF document text
    • http://tiktokcopyrighthelpteam.com/lugiwop20lj.pdfIn PDF document text
    • http://uose.xyz/free_living_will_template_georgiad0lql.pdfIn PDF document text
    • http://digitalliteracyinstitute.com/how_to_make_a_flamethrower_in_minecraft_command_blocke5992.pdfIn PDF document text
    • http://all-system7.xyz/8764584756aonep.pdfIn PDF document text
    • http://yourlivehelp.com/papopubodujigamasegaves40wi.pdfIn PDF document text
    • http://matroskin.space/application_letter_for_leave_format_sample56f8w.pdfIn PDF document text
    • https://dufavepuxafolim.weebly.com/uploads/1/3/4/2/134266173/zimomofutipazo.pdfIn PDF document text
    • http://slamelina.website/fumubagozusimitifamonenelwl28.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://46c0acaa-de7d-4f46-84f0-c2cf1d8ff7d9.filesusr.com/ugd/ac1638_e0a25aa6716f4f898676539277b1ed3c.pdf?index=trueIn PDF document text
    • https://55d63786-14d6-44de-84d0-33f1fb383c44.filesusr.com/ugd/45fd81_c34009d2ec74416bb1b731fbf4280cad.pdf?index=trueIn PDF document text
    • https://92e0cadd-ca3c-497d-ba7d-1aece6ee6da0.filesusr.com/ugd/008e52_fe3d36a86602405fba29d606c98a1e49.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/widuxade/literary_terms_review_sheet_part_1_answers.pdfIn PDF document text
    • https://e4034479-4ead-418b-af8c-5be8dc72bdbe.filesusr.com/ugd/1e8759_773bf0bccbc04ed69046fd1444e30b06.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/tugabijenovili/22901346791.pdfIn PDF document text
    • https://d56a38bf-d62e-453c-9b5b-5b2fe88aea46.filesusr.com/ugd/359e64_5811fe37865a4810905949f03d3bcc46.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/wavunot/alpha_headline_pro_font.pdfIn PDF document text
    • https://s3.amazonaws.com/tokit/tiwipuw.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

Related samples 8

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

Full JSON: related samples API

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000cf44.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCF44 5660 bytes
SHA-256: b1245f7975dec0146604affc1f13cfdf6aaef80899e49d7e7072fcf93233ca39
font_01_sfnt_off0000e272.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE272 10452 bytes
SHA-256: a2ffa3e833a19d61884cce3bbcf8acb90f1cf1a97216716f6053e7fc46a52070

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