Malicious PDF — malware analysis report

Static analysis result for SHA-256 71c0979582854371…

MALICIOUS

PDF

78.6 KB Created: 2021-03-31 20:02:21 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-25
MD5: 71a18029cbf0ab0acc6554a4ebe5b8ae SHA-1: e56e2901dbb293992c770284637ca00791ff6662 SHA-256: 71c0979582854371139dde30b3ed969d8af6487601463f2725029f812b349b94
186 Risk Score

Malware Insights

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

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 0.9998

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
  • Small PDF contains mass external PDF link farm critical PDF_SEO_LINK_FARM
    Small PDF contains many clickable external PDF links, mostly clustered on one host. This matches generated SEO/link-farm PDF carriers used to route users into malicious or unwanted-software delivery chains, rather than a normal document citation pattern.
  • 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://soxebez.ru/wix?keyword=the+ruby+circle+pdf+espa%25C3%25B1ol+descargar PDF link annotation
    • https://cdn.sqhk.co/tuxonewebuke/Hawbge9/5180298342.pdfIn PDF document text
    • https://cdn.sqhk.co/sawibevas/geLhxii/81102151185.pdfIn PDF document text
    • https://lijemokuw.weebly.com/uploads/1/3/4/8/134853622/gugexigar.pdfIn PDF document text
    • https://pamaxorakumi.weebly.com/uploads/1/3/4/0/134019068/575beb395b32.pdfIn PDF document text
    • https://cdn.sqhk.co/sojowidaz/fjhghFN/fejadukagidudogasisakuw.pdfIn PDF document text
    • https://cdn.sqhk.co/feluxolid/esjbigr/golenuzumuzenurikof.pdfIn PDF document text
    • https://cdn.sqhk.co/wemorapi/jahjigD/first_three_words_of_the_bible.pdfIn PDF document text
    • https://xarupome.weebly.com/uploads/1/3/4/4/134469096/fotitunemimewok.pdfIn PDF document text
    • https://cdn.sqhk.co/soxosovave/Naihhjw/88726136450.pdfIn PDF document text
    • https://cdn.sqhk.co/gupuwiwi/QigQnYo/nail_it_salon_near_me.pdfIn PDF document text
    • https://cdn.sqhk.co/jututumogu/1QgXihq/83178382832.pdfIn PDF document text
    • https://noxajigaja.weebly.com/uploads/1/3/4/6/134698193/2b2d228c57b5342.pdfIn PDF document text
    • http://profaudit32.ru/2391440003584t3k.pdfIn PDF document text
    • https://cdn.sqhk.co/xivovido/cifhdl0/reaper_pepper_recipes.pdfIn PDF document text
    • http://kovuzaxaf.medianewsonline.com/red_rising_series_characters.pdfIn PDF document text
    • http://wojesukuzak.mygamesonline.org/is_there_a_riding_trainer_in_undercity.pdfIn PDF document text
    • http://aycotoro0.xyz/how_to_cope_with_interview_anxietymlpsk.pdfIn PDF document text
    • https://cdn.sqhk.co/jezaziritav/hfQwIib/installer_un_mod_minecraft_windows_10.pdfIn PDF document text
    • https://cdn.sqhk.co/tumosirewuw/34geie0/32587071668.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn 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_off0000f13f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF13F 5820 bytes
SHA-256: 0003e809fbdeebac41a0636d6a1d0d2625addd65fef53b45c97f288a32816c59
font_01_sfnt_off000104ca.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x104CA 11524 bytes
SHA-256: a3304e6ea8d93491c2ac7d92d602deb7af13fa400336463d999febb3b9cf13a3

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