Malicious PDF — malware analysis report

Static analysis result for SHA-256 ee2a14b3d5f6979f…

MALICIOUS

PDF

81.9 KB Created: 2021-03-29 17:11:28 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-08-20
MD5: fd046dddd1b5a3f93f5a6a699153fc49 SHA-1: b1f44b46c4f1346f8a978bd8354c5c5b17d5f42b SHA-256: ee2a14b3d5f6979faff8b24035ea55ec2fb850897c1436d7086dbd659d78b039
126 Risk Score

Malware Insights

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

This PDF file was flagged as malicious by ML classifiers and ClamAV, indicating a high likelihood of malicious intent. It functions as a link farm, containing numerous embedded URLs pointing to external domains, many of which are hosted on disposable domains. The heuristic 'PDF_SEO_DISPOSABLE_LINK_FARM' strongly suggests a phishing or malware distribution scheme. While no scripts were explicitly extracted, the nature of the embedded URLs and the link farm structure implies an attempt to lure users to malicious sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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://jacksth.ru/strik?utm_term=explain+the+message+of+the+road+not+taken PDF link annotation
    • http://kotudekudoges.getenjoyment.net/adding_like_fractions_worksheets.pdfIn PDF document text
    • http://jewogipuwivi.medianewsonline.com/kideguger.pdfIn PDF document text
    • http://zeropium.com/poragelokepemekelisusckyjt.pdfIn PDF document text
    • http://lofitner.buzz/6669357772655pk2.pdfIn PDF document text
    • https://lekinowi.weebly.com/uploads/1/3/4/4/134476644/cc3f21bf4616769.pdfIn PDF document text
    • http://smotrikino.fun/21st_birthday_party_invitation_card_templatexlyk5.pdfIn PDF document text
    • http://francobusiness.com/zidomapunimesebib6sdo9.pdfIn PDF document text
    • http://train-home.ru/25502124913ju6ph.pdfIn PDF document text
    • http://bitsracing.net/befixuvoxutesafu6q747.pdfIn PDF document text
    • http://relax35.ru/unconscious_bias_training_materialsgse9e.pdfIn PDF document text
    • https://logazimakopaw.weebly.com/uploads/1/3/4/3/134399250/bamatolokunofonupes.pdfIn PDF document text
    • http://jsexj.fun/does_he_like_me_backjc9a9.pdfIn PDF document text
    • https://burakizu.weebly.com/uploads/1/3/1/0/131070688/85d1f3837f6.pdfIn PDF document text
    • http://huseyincanx.com/the_human_brain_book_downloadcmupe.pdfIn PDF document text
    • http://megopoveguvujal.medianewsonline.com/89168782659.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/buponuwebi/america_s_got_talent_2018_finale_performances.pdfIn PDF document text
    • https://s3.amazonaws.com/woneketelak/weather_report_shimla_7_day.pdfIn PDF document text
    • https://s3.amazonaws.com/dalava/multiplying_fractions_worksheets_6th.pdfIn PDF document text
    • https://s3.amazonaws.com/suxugipipolazog/nutritional_information_egg_white_hard_boiled.pdfIn PDF document text
    • https://s3.amazonaws.com/zoluwivebiro/bugilatavase.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_off0001020e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1020E 5544 bytes
SHA-256: 8aade20005b3d25c086f7ce9b3a514eee0ff0bd024805b5446d7dc0989c614b9
font_01_sfnt_off000114c7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x114C7 10756 bytes
SHA-256: 3196921d77bb49ad7a8e7cb27dbf8d77423e4fde3845be3fb2b6b7f93bd7732c

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