Malicious PDF — malware analysis report

Static analysis result for SHA-256 a5989dee60f3d26f…

MALICIOUS

PDF

71.9 KB Created: 2021-02-02 07:13:37 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-15
MD5: 69d0f6c6fc87a9e6f46dea73ce5cdb57 SHA-1: e553fd76cfc45fca885e51729359f0c2883f392d SHA-256: a5989dee60f3d26f9b314f81914e0d50aacf79c0e8852423c0782b0ca3a4584e
156 Risk Score

Malware Insights

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

The PDF contains a large number of external links, identified as a PDF link farm, suggesting a malicious intent to redirect users to potentially harmful sites. The ClamAV detection and ML classifier strongly indicate malicious content. While no scripts were explicitly extracted, the PDF structure and embedded links are indicative of a phishing or SEO manipulation tactic.

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/123?utm_term=hangin+tree+cowdog+for+sale PDF link annotation
    • https://rixafivi.weebly.com/uploads/1/3/1/3/131380000/a550abebb494dd5.pdfIn PDF document text
    • http://jopkapopka.online/xaximezajusenuxuddmdby.pdfIn PDF document text
    • https://zeraxoxuret.weebly.com/uploads/1/3/4/6/134642117/6245589.pdfIn PDF document text
    • http://arendaavto.taxi/trapped_in_the_forest_free_downloadx47ek.pdfIn PDF document text
    • https://jitavemalidev.weebly.com/uploads/1/3/1/8/131871699/jexekadozikijowenad.pdfIn PDF document text
    • https://libadelalisam.weebly.com/uploads/1/3/4/5/134579317/dibanilon.pdfIn PDF document text
    • http://in-step.shop/huey_magoos_menu_prices82gac.pdfIn PDF document text
    • http://delaem-sami.online/36444756762wq4c0.pdfIn PDF document text
    • http://copyrightsupport-ig.com/comedy_central_app_directv_nowq0fmn.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/ribowexulo/english_worksheets_for_grade_4_south_africa.pdfIn PDF document text
    • https://s3.amazonaws.com/rolefosiju/vertex42_free_invoice_template.pdfIn PDF document text
    • https://s3.amazonaws.com/wujodibu/kusovunubesen.pdfIn PDF document text
    • https://s3.amazonaws.com/waxapoz/betojixuxa.pdfIn PDF document text
    • https://s3.amazonaws.com/zonivezada/60445408736.pdfIn PDF document text
    • https://s3.amazonaws.com/roxawo/terraform_aws_iam_role_policy_attachment_count.pdfIn PDF document text
    • http://gelepovasogadax.epizy.com/auto_blur_editor_apk.pdfIn PDF document text
    • https://s3.amazonaws.com/juvetaso/classification_of_animals_worksheet_grade_2.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_off0000ded3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDED3 5240 bytes
SHA-256: 2813a23a16c9368e32ca6b8cd57a9db1171915e904d265ea00cac06b34f281d2
font_01_sfnt_off0000f0ca.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF0CA 9900 bytes
SHA-256: 624bd95517b2e653900c86e7bdabf0a6b545cd813f2a85670a1f60032e15a974

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