Malicious PDF — malware analysis report

Static analysis result for SHA-256 ea6bbfc83a20d351…

MALICIOUS

PDF

75.6 KB Created: 2021-01-25 14:55:49 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-12
MD5: 7f544f2bc8004433319df3275412aea8 SHA-1: 735db4d3d85553ffcc6aa4141a91ef6034803b54 SHA-256: ea6bbfc83a20d3513540a969cc75b30e2f053b71765a27c3b50b9ed9870c151c
156 Risk Score

Malware Insights

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

The PDF document is flagged as malicious by multiple heuristics and a machine learning classifier, indicating it's likely a phishing lure disguised as a TV show episode guide. The presence of a large number of external links, many pointing to PDF files with generated slugs, suggests a link farm or redirection mechanism. While no scripts were explicitly extracted, the PDF structure and numerous external links are indicative of malicious intent, potentially leading to further exploitation or credential harvesting.

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://trafftec.ru/aws?utm_term=new+amsterdam+tv+show+episode+guide PDF link annotation
    • https://cdn.sqhk.co/tubafejog/jLm5jaN/kegufibuporuduxubirabonal.pdfIn PDF document text
    • https://benowanazopawa.weebly.com/uploads/1/3/0/7/130740092/gufepuja-pigekoveso-laruwefatilof-sajefozegov.pdfIn PDF document text
    • https://janirakuvofubej.weebly.com/uploads/1/3/4/7/134734148/busirorejazonin.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4407777/normal_5fcbd90007537.pdfIn PDF document text
    • https://bojuwidus.weebly.com/uploads/1/3/4/6/134698781/e401e6.pdfIn PDF document text
    • https://xaziribubeka.weebly.com/uploads/1/3/4/3/134397614/a940155ea8295a7.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4368245/normal_60057d800d822.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4392191/normal_5feeeddbe7881.pdfIn PDF document text
    • https://xesuxikoju.weebly.com/uploads/1/3/4/0/134095833/9766979.pdfIn PDF document text
    • https://cdn.sqhk.co/zenekukera/hihdMJa/11909365324.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4458840/normal_5fdecdca39168.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4483083/normal_5fcb1c5a3dde5.pdfIn PDF document text
    • https://cdn.sqhk.co/gubogezemazo/zieheig/paxanujun.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4450870/normal_600256707a097.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4482402/normal_60083f66a8885.pdfIn PDF document text
    • https://cdn.sqhk.co/zarifabidit/tMv4jbi/pokemon_go_promo_codes_september_2020.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://voxotili.epizy.com/nuvifafumabegadokoja.pdfIn PDF document text
    • http://wokasob.rf.gd/bitwise_solutions_pune_interview_questions_and_answer.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_off0000ea6e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEA6E 5464 bytes
SHA-256: 85469480c69eecdec55337e2a59a750cd4ec4d364aaee946cf7359e36180926a
font_01_sfnt_off0000fcf5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFCF5 10692 bytes
SHA-256: ccdc38265be11e2c3d14ea839f20fdd8a14f5afb0cc5052ee86c2022d57d3df9

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