Malicious PDF — malware analysis report

Static analysis result for SHA-256 86568f54043c4ff2…

MALICIOUS

PDF

77.5 KB Created: 2021-03-18 18:44:38 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: d5185e9b7a959752607a165aa277bd35 SHA-1: 799a3fe8fad43e7d139c7c21405a5f92e9ca13b0 SHA-256: 86568f54043c4ff2853c3731b3c43f32d63de329726170e0e5d848edd80b54be
156 Risk Score

Malware Insights

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

The PDF contains a significant number of external links, many pointing to Weebly and other free hosting services, indicative of a link farm. The ML classifier and ClamAV detection strongly suggest malicious intent, likely related to phishing or malware distribution. Although no scripts were extracted, the PDF structure and embedded URLs point towards an attempt to redirect users to potentially harmful content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

Heuristics 5

  • 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.
  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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://resalured.ru/123?utm_term=awdhesh+premi+ke+gana+dj
    • https://bawilawuvibowe.weebly.com/uploads/1/3/4/4/134401702/9e1dc0558e83.pdf
    • https://wetuwisiw.weebly.com/uploads/1/3/4/4/134495793/puzij.pdf
    • https://zadumeredevasax.weebly.com/uploads/1/3/1/4/131453870/5517240.pdf
    • http://pobesegu.scienceontheweb.net/what_did_anna_freud_study.pdf
    • http://gejedesoni.getenjoyment.net/yours_forever_chords_kari_jobe.pdf
    • https://joxunirefebemi.weebly.com/uploads/1/3/4/3/134319414/jepimuguxota.pdf
    • http://paxulujomem.iblogger.org/asfixia_perinatal_siben.pdf
    • https://bumaxaxup.weebly.com/uploads/1/3/4/2/134235918/medosi.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://fedorahosted.org/lohit
    • http://xinirujoki.epizy.com/nuduvurokowosi.pdf
    • https://uploads.strikinglycdn.com/files/6e666e93-78c1-409c-8c12-420e98530a25/michael_crichton_timeline_review.pdf
    • https://uploads.strikinglycdn.com/files/fbeae5d3-6185-458a-b6a1-83748e700484/84549853311.pdf
    • https://uploads.strikinglycdn.com/files/0db60b25-bf1c-427c-bf6d-248e07516d84/vopumowoz.pdf
    • https://s3.amazonaws.com/safenalavojuwu/77579121786.pdf
    • http://wegamaluperetuj.atwebpages.com/nazowoduperalatalibotu.pdf
    • https://uploads.strikinglycdn.com/files/1207b495-7db5-4e46-8905-a732b4692fe5/zufatumelu.pdf
    • http://pozidijapepore.atwebpages.com/financial_analyst_roles_and_responsibilities.pdf
    • http://mosiwejajawam.rf.gd/comment_combiner_plusieurs_en_1.pdf
    • https://uploads.strikinglycdn.com/files/bbe7f5b4-4c30-4c5e-96e2-f434f8d5b571/71845595859.pdf
    • https://s3.amazonaws.com/lezerawe/mumuvekozegaboxoradofob.pdf
    • https://s3.amazonaws.com/dugibabafod/fokubo.pdf
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/
    • http://scripts.sil.org/OFL

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e523.bin
ce2716d7a7693b907c9d10692c04db3ed35f14657ef303edd3239d83805294f6		 pdf-font-stream PDF embedded font (sfnt) at offset 0xE523 5560 bytes
font_01_sfnt_off0000f7fc.bin
ed9a6fdd1c91593182b7d098af634a11fdee80551edda538a96222d2c1caffe6		 pdf-font-stream PDF embedded font (sfnt) at offset 0xF7FC 10132 bytes
font_02_sfnt_off00011aed.bin
64e9eaeced458c62b2058d7e97a53bbffae8dbf08b14fbd8f2e6da185c2d2dfb		 pdf-font-stream PDF embedded font (sfnt) at offset 0x11AED 3472 bytes

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