Malicious PDF — malware analysis report

Static analysis result for SHA-256 412a5c6ec6467a2f…

MALICIOUS

PDF

76.5 KB Created: 2020-12-22 08:04:22 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-05
MD5: fe9e1661f54596d19168df7aff93c1f9 SHA-1: 3b81986383085757446053234f92c8e6e7ed4ed8 SHA-256: 412a5c6ec6467a2f354fa4f1475d20530d7835efeeba0d6cbfec154a45f30152
156 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

This PDF file was flagged by multiple heuristics, including a critical PDF link farm detection and a machine learning classifier, indicating malicious intent. The embedded URLs and the document body suggest a lure to external websites, likely for phishing or SEO spam. The ClamAV detection as 'Pdf.Phishing.Trojan' further supports its malicious nature.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://traffking.ru/123?utm_term=watch+anchorman+online+free+hd PDF link annotation
    • https://redunexodozik.weebly.com/uploads/1/3/0/8/130814050/108f2.pdfIn PDF document text
    • https://fovojewonot.weebly.com/uploads/1/3/4/6/134669065/rejiwixebojeroz-tuzorujozuzabad-pawizoxonemejut.pdfIn PDF document text
    • https://xumuxurubaxuk.weebly.com/uploads/1/3/4/5/134501003/jawudufavi-pegusajomu.pdfIn PDF document text
    • https://firedisivimi.weebly.com/uploads/1/3/0/9/130969818/a4f688e6f7ca.pdfIn PDF document text
    • https://vovinusowoxojik.weebly.com/uploads/1/3/4/3/134349833/natevamabemugat.pdfIn PDF document text
    • https://kitopelok.weebly.com/uploads/1/3/4/3/134355781/wumujufa_benet_majimeg.pdfIn PDF document text
    • https://siregudak.weebly.com/uploads/1/3/0/7/130738759/194593.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/pokorevalaxex/nuraganesitobunar.pdfIn PDF document text
    • https://s3.amazonaws.com/suxugipipolazog/vipowumawulalerijezaj.pdfIn PDF document text
    • https://s3.amazonaws.com/fotojipifuzitul/37626513942.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/52eee84f-879c-44c2-aa45-216027e7fe4e/soft_sole_shoes_for_heel_pain.pdfIn PDF document text
    • https://s3.amazonaws.com/kosamupim/formule_calcul_salaire_net_en_brut_france.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/7e7b5365-44af-4c47-ae5c-1ea51139aba3/vasidelo.pdfIn PDF document text
    • https://s3.amazonaws.com/zubuwujoxom/bededezisuligixo.pdfIn PDF document text
    • https://s3.amazonaws.com/wewuxuviwar/cisco_3750_ios_upgrade_archive_-_sw.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_off0000eefa.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEEFA 5096 bytes
SHA-256: 34f1b39beda4f759b56afde6b2cf24b93b04b642f9320f758dfeb7cedd755259
font_01_sfnt_off00010032.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10032 10832 bytes
SHA-256: 55ad2d12badac626ed55eeaaf4967642fee692c2e43939a9b11e29517f39beba

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