Malicious PDF — malware analysis report

Static analysis result for SHA-256 50ab65cad9981a05…

MALICIOUS

PDF

77.3 KB Created: 2021-03-16 19:49:43 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-23
MD5: 38c6cdaf72ba829b899530492b4f072d SHA-1: e8446e7a88358563b18429f23d948a0e74c4f41b SHA-256: 50ab65cad9981a05b61178326d17aa2a3e509070216b12a0aa68513b4a0e9a8a
126 Risk Score
Tags
free-cdn-ebook-manual-lure

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://dugedepap.ru/123?utm_term=talisman+digital+edition+android+full PDF link annotation
    • https://cdn.sqhk.co/sawusuzi/IH79ngg/sejolafitixove.pdfIn PDF document text
    • http://unonatur.space/rajavaxixudirni5w.pdfIn PDF document text
    • http://linefofaxugedu.mywebcommunity.org/formal_language_and_automata_theory_textbook.pdfIn PDF document text
    • http://xitabijasava.getenjoyment.net/32224344299.pdfIn PDF document text
    • http://baderezu.scienceontheweb.net/86057870498.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4382976/normal_6045e87918bc1.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4376380/normal_6042153bb2a26.pdfIn PDF document text
    • https://cdn.sqhk.co/wuxaguzifep/iQHqhgt/never_have_i_ever_questions_college_dirty.pdfIn PDF document text
    • http://zdorovie-vashe-vse.xyz/jomezodaxq0exg.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4410201/normal_5fd1f002a4931.pdfIn PDF document text
    • https://cdn.sqhk.co/lijuwezasip/tggbRBN/firaremebi.pdfIn PDF document text
    • https://cdn.sqhk.co/nozedimasav/cPwvhg8/lesson_plan_template_for_speech_therapist.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4459060/normal_5fe1f11b3c50d.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4502721/normal_5fc87067662f0.pdfIn PDF document text
    • http://anbieterbewertung-autoscoutch.com/countable_and_uncountable_nouns_worksheet_for_grade_2xxonc.pdfIn PDF document text
    • https://cdn.sqhk.co/rapurakoke/0Ajehdc/little_heroes_2_2000_full_movie.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/fevobelijogal/resident_evil_4_biohazard_game_for_android.pdfIn PDF document text
    • https://s3.amazonaws.com/banula/7703764298.pdfIn PDF document text
    • https://s3.amazonaws.com/wemofodi/white_christmas_lights_with_white_string.pdfIn PDF document text
    • http://xobibaga.myartsonline.com/achyuta_ashtakam_lyrics_in_telugu.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 6

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_off0000eba4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEBA4 5176 bytes
SHA-256: 8df0001758521df5765d00c858263d459b18944dae5de230f34c744c3394fb1c
font_01_sfnt_off0000fd27.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFD27 12928 bytes
SHA-256: f3446dd76a798313a02dfb2812f1170dd61e79b46c1b36debcd87e9eec93cf26

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