Malicious PDF — malware analysis report

Static analysis result for SHA-256 7c126f2fe83cbbb6…

MALICIOUS

PDF

77.8 KB Created: 2021-02-20 03:29:58 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-22
MD5: d627f0c6c6831a567e2422ac89f6861c SHA-1: 1117c620df98192862a43fd71fb33e2540abb37a SHA-256: 7c126f2fe83cbbb6307dc17c7aca023c0d5df415a0a8ab3c656dc3694efc8472
156 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

This PDF document was flagged as malicious by ClamAV and an ML classifier. The file embeds a large number of external links characteristic of an SEO link farm. Specific URLs and indicators for this sample are listed in the indicators section.

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://bologen.ru/strik?utm_term=how+to+reduce+business+property+tax PDF link annotation
    • https://rurusoweloxefug.weebly.com/uploads/1/3/3/9/133989150/3536126.pdfIn PDF document text
    • https://jizanisa.weebly.com/uploads/1/3/5/3/135386656/e1706133ca9f81.pdfIn PDF document text
    • https://zoninezazazi.weebly.com/uploads/1/3/1/0/131070362/jororede_vojarefedaniwu.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4445879/normal_602cadaf30940.pdfIn PDF document text
    • https://fowaloxew.weebly.com/uploads/1/3/4/8/134881160/putogadedogax.pdfIn PDF document text
    • https://zigajimimokok.weebly.com/uploads/1/3/1/3/131383588/ea1e206e95b.pdfIn PDF document text
    • https://zuvoxowiton.weebly.com/uploads/1/3/0/8/130813332/5066209.pdfIn PDF document text
    • https://zademufexek.weebly.com/uploads/1/3/4/7/134765537/8011189.pdfIn PDF document text
    • https://volilisaxox.weebly.com/uploads/1/3/1/4/131453747/pijefol-xovan-taxomogomudi-jutijufodo.pdfIn PDF document text
    • https://dovidememalow.weebly.com/uploads/1/3/4/6/134601329/jilifexobepax_labewu.pdfIn PDF document text
    • https://kojivijagidisu.weebly.com/uploads/1/3/4/0/134042347/ripoz_lezuxogelez_xubusimomis_viluwuved.pdfIn PDF document text
    • https://zukevijidogokil.weebly.com/uploads/1/3/0/7/130738647/1712684.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/jadere/sumiwirumogijak.pdfIn PDF document text
    • http://fepujusarif.epizy.com/12757923823.pdfIn PDF document text
    • https://s3.amazonaws.com/dorulusof/happy_birthday_to_u_ringtone.pdfIn PDF document text
    • https://s3.amazonaws.com/davubewu/incident_reporting_system_definition.pdfIn PDF document text
    • http://pepajefosub.epizy.com/avery_labels_design_pro.pdfIn PDF document text
    • https://s3.amazonaws.com/xifabilejilab/liburafomigipata.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_off0000f2c8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF2C8 5400 bytes
SHA-256: 26d5d2a338a2e01d98dd8d07f1991077181fdad4f5d592ddeb21999f83cf450d
font_01_sfnt_off00010543.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10543 10676 bytes
SHA-256: da0d2b8780bd951cb167ee7d7fbe6ad4fbbda0b2afbef9752bab09a329aebdf6

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