Malicious PDF — malware analysis report

Static analysis result for SHA-256 97fe50e7bb5d35a5…

MALICIOUS

PDF

75.8 KB Created: 2021-01-26 19:20:25 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-16
MD5: 41f8680c64d914f62f4ccbdc7cbd191c SHA-1: 93a47a72cd9f99fff0147919014ef0b1e50ca19d SHA-256: 97fe50e7bb5d35a5821755dcea730b31f4a43a812f140ac09005ff4d8f6dba8f
156 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

The PDF contains numerous external links, many of which are hosted on suspicious domains or are part of a link farm, suggesting a phishing or redirection attempt. The ML classifier and ClamAV detection strongly indicate malicious intent, likely related to phishing or malware distribution. Although no scripts were explicitly extracted, the PDF structure and embedded links are indicative of a lure to external malicious content.

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 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.
  • 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/aws?utm_term=google+search+engine+optimization+starter+guide+pdf PDF link annotation
    • https://ludalobupum.weebly.com/uploads/1/3/4/5/134528654/4266087.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4463565/normal_600d6bc84f74a.pdfIn PDF document text
    • https://dapobirot.weebly.com/uploads/1/3/4/8/134888013/kituwirepefeb.pdfIn PDF document text
    • http://tersq.space/bosewedojirubovikvn6pc.pdfIn PDF document text
    • http://particulieres-societegenerale.best/55236619499cbqm1.pdfIn PDF document text
    • http://alex-travel.moscow/tutugojulubvkne.pdfIn PDF document text
    • http://reduslim-ordina.site/sonny_s_bbq_tallahassee_menu_pricessoh6z.pdfIn PDF document text
    • http://itactical.xyz/zozufudubajuwubokoxerofe97whq.pdfIn PDF document text
    • https://bojubuloxobepi.weebly.com/uploads/1/3/0/9/130969884/f6e717.pdfIn PDF document text
    • http://stavki.link/ez_loader_pwc_trailer_specsv6dq9.pdfIn PDF document text
    • https://kesozelakix.weebly.com/uploads/1/3/5/3/135300748/69591.pdfIn PDF document text
    • http://fishing-rods2.club/soccer_games_like_clash_royalegmx09.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4383146/normal_5fcd0bc16a543.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/xovekolamoxe/kigikewevugivenosu.pdfIn PDF document text
    • https://s3.amazonaws.com/kosamupim/metonoguma.pdfIn PDF document text
    • https://s3.amazonaws.com/rizezobabub/funigivizako.pdfIn PDF document text
    • https://s3.amazonaws.com/gedexim/98307635873.pdfIn PDF document text
    • https://s3.amazonaws.com/kakekojezutok/23749941336.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_off0000e979.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE979 5652 bytes
SHA-256: cb908330160055d3ca822444bc2c370aa8094f76e9a7b9f0265ade58ded9bc4b
font_01_sfnt_off0000fc96.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFC96 11028 bytes
SHA-256: 75e73433db7df6f4da570584e32f0efb1d31186655ddd86affad5f4cca53cd0a

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