Malicious PDF — malware analysis report

Static analysis result for SHA-256 695af2aaa15aa285…

MALICIOUS

PDF

89.2 KB Created: 2020-12-19 01:08:53 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-14
MD5: 210925e6edc9f0a508be39857bc5e1ad SHA-1: 27782520eab63a60f240c98f0bfd04a2982c4def SHA-256: 695af2aaa15aa285ec1de45af00b90a3d928177953466d3c1c6d62f5293e0b70
214 Risk Score

Malware Insights

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

The PDF contains numerous links to external websites, with at least one identified as a malicious redirector. The embedded content, though heavily obfuscated, suggests an attempt to disguise the malicious nature of the links. The presence of a link farm and a critical heuristic firing for malicious redirector links strongly indicates a phishing or scam attempt.

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
  • PDF links to known malicious redirector infrastructure critical PDF_MALICIOUS_REDIRECTOR_LINK
    PDF contains a clickable URI to redirector infrastructure used by a known malicious PDF SEO/adware delivery campaign. These documents typically rely on user interaction and redirect chains rather than a PDF parser vulnerability.
  • 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.
  • 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://cctraff.ru/aws?utm_term=bitdefender+antivirus+plus+2019 In PDF document text
    • https://xowogibudul.weebly.com/uploads/1/3/4/4/134446034/tepofevexosuma.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4385876/normal_5fdb2996bab88.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4417045/normal_5fc310bddae1c.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4417023/normal_5fc4fb5bc0af9.pdfIn PDF document text
    • https://lidoporovumo.weebly.com/uploads/1/3/4/5/134506542/pogizugo.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4378379/normal_5fd61f52c3c01.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/farowug/49509930841.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc2a774c6d96458362d6425/t/5fc7edf30581dd30a08ce501/1606938100584/dajatafanex.pdfIn PDF document text
    • https://s3.amazonaws.com/mujesogi/88135883997.pdfIn PDF document text
    • https://s3.amazonaws.com/gogonof/vedonipuzivobodaxo.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fbce344be7cfc36344e8aaf/t/5fbe30a04e98326c02da7365/1606299809363/frigidaire_affinity_front_load_washer_manual.pdfIn PDF document text
    • https://s3.amazonaws.com/zetubakuz/princess_aerocraft_manual.pdfIn PDF document text
    • https://s3.amazonaws.com/mufukep/34286264798.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc10f3717e7202640eb17fd/t/5fc73cd55060c93fcd79e6e4/1606892757596/cooking_mania_2020_food_chef_restaurant_crazes.pdfIn PDF document text
    • https://s3.amazonaws.com/kewakuko/bapos.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc0d35cb8467722f1d3edf7/t/5fc518553c6ccf69f300bada/1606752341345/population_density_and_distribution_worksheet_answers.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fcf41e0efaa704a0f5c5bb2/t/5fd6dda9e5ac582896348d0e/1607916969955/proving_congruence_worksheet.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_off0001202d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1202D 5628 bytes
SHA-256: e11c32f0d97a598e7d2cb369a9a96376c94487fbd6ad42d0b0e9f162dd8a05c4
font_01_sfnt_off0001336b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1336B 10564 bytes
SHA-256: 3ebfdb8e72c73e50553d58bb9ff3021bd1fd36aa777de2deb3742764ffcc114d

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