Malicious PDF — malware analysis report

Static analysis result for SHA-256 693c199a5ffd2c09…

MALICIOUS

PDF

75.9 KB Created: 2020-12-26 16:59:48 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-26
MD5: d2fc29f07d3db35b42460d7345e192e8 SHA-1: 195e9178449d2b8642f25f3aed3566468c9118c2 SHA-256: 693c199a5ffd2c0982687b486408aefdc4ab1e3ee8cc1ee5f6af613b93df3d01
156 Risk Score

Malware Insights

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

The PDF file was flagged by multiple heuristics, including PDF_SEO_LINK_FARM and ML_NYX_PDF_MALICIOUS, indicating a high likelihood of malicious intent. The presence of numerous external links, including one pointing to 'trafffi.ru', suggests an attempt to manipulate search engine results or redirect users to potentially harmful content. ClamAV also detected it as Pdf.Phishing.Trojan.

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
  • 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://trafffi.ru/aws?utm_term=good+background+color+for+android+app PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4366340/normal_5fd91fd1ab6c5.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4404293/normal_5f98c2c640c1a.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4409093/normal_5fcd98daa0fc9.pdfIn PDF document text
    • https://xonugovelixef.weebly.com/uploads/1/3/0/7/130739086/8987079.pdfIn PDF document text
    • https://jadivamanug.weebly.com/uploads/1/3/4/8/134868371/werinagubire.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4482403/normal_5fc69faa195d0.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://uploads.strikinglycdn.com/files/758f3ea7-9b7c-4cdb-a392-15a4ef0b9219/43067411652.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/197d7f8a-1ef8-4e9b-8ffa-08d2cb861feb/wuxul.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/617921ac-67e2-4859-9e10-931fed1c5df4/common_panda_hair_wax_coupon_code.pdfIn PDF document text
    • https://s3.amazonaws.com/zamuriza/2015_charger_rt_performance_mods.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/5e15e350-90fe-47fb-a359-8939790ac32a/zone_de_tlchargement_nouvelle_adresse_2020.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/af2c0e63-f50c-4551-92c2-e93adc59d098/skyrim_special_edition_mod_load_order_tool.pdfIn PDF document text
    • https://s3.amazonaws.com/falevi/embryology_development.pdfIn PDF document text
    • https://s3.amazonaws.com/dapekufoxiraku/certified_medical_assistant_exam_study_guide.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_off0000eb03.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEB03 5380 bytes
SHA-256: 9f07e62fd227b6053d111a823fef6f91c93a1702740e733afef80a26d5172c31
font_01_sfnt_off0000fd69.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFD69 10896 bytes
SHA-256: 7e3deea232ec52b8442de8c8e4252d7bc354e44273d3bc2390271318ad4d3c92

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