Malicious PDF — malware analysis report

Static analysis result for SHA-256 0f9d282fc72104f0…

MALICIOUS

PDF

70.3 KB Created: 2021-02-24 03:23:23 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-07
MD5: 581cc95f7117b3642898c9a77280732d SHA-1: d8cd051eb4adb7a0b48783b606d3f40b3ad63da3 SHA-256: 0f9d282fc72104f0fcf62098a98307e3bafbf71e7437260a71a8c0002d8aefc7
186 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 contains a large number of external links, many pointing to disposable domains, suggesting a link farm designed to distribute malware or conduct phishing. The document body, though heavily obfuscated, contains references to search terms and application details, further supporting the lure-based attack pattern.

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://maypoin.ru/aws?utm_term=how+many+promotion+points+is+field+sanitation+worth PDF link annotation
    • http://hesap-al-sat.com/my_little_baby_korean_drama_reviewn5e0h.pdfIn PDF document text
    • https://kenemujawov.weebly.com/uploads/1/3/4/6/134645985/c70a71d9426cc2.pdfIn PDF document text
    • https://davabodijesofid.weebly.com/uploads/1/3/4/4/134474123/tugokowuverige_jabokaron.pdfIn PDF document text
    • http://disesomudo.22web.org/xuniwanijinovepo.pdfIn PDF document text
    • http://pedron.fun/zimivobonabiduruseladerse1.pdfIn PDF document text
    • https://kevefizi.weebly.com/uploads/1/3/1/8/131871405/4e819edfa6cac.pdfIn PDF document text
    • https://masezinonorokun.weebly.com/uploads/1/3/4/6/134685416/94ac4a2d9e.pdfIn PDF document text
    • http://datingdate.site/jasitowudorewurituwazopulaf.pdfIn PDF document text
    • https://nifiguxo.weebly.com/uploads/1/3/1/3/131398563/subomajorogafomemavo.pdfIn PDF document text
    • https://safasisi.weebly.com/uploads/1/3/4/4/134472516/folexidijok.pdfIn PDF document text
    • http://card2card-perevod24.site/925839116544bapv.pdfIn PDF document text
    • https://nenovalo.weebly.com/uploads/1/3/2/7/132712003/fefodezoxokiwa.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://demuwesax.epizy.com/17920292883.pdfIn PDF document text
    • http://wupubobetob.epizy.com/game_burnout_takedown_untuk_android.pdfIn PDF document text
    • http://dimakadube.epizy.com/jotitesefonozewaf.pdfIn PDF document text
    • http://nakedavip.epizy.com/toninefofaber.pdfIn PDF document text
    • http://zerakunutage.epizy.com/figurative_language_worksheet_9_answers.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_off0000d5d1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD5D1 5436 bytes
SHA-256: 42ae7755792fece24ea301b24f4457fbd066db8f4aa66f2c6c00bb4388cbe549
font_01_sfnt_off0000e831.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE831 10464 bytes
SHA-256: 48aae119e809ebee3a5090582ffc6f9b75d0edf106ccee815df0fa2a6ea28c0b

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