Malicious PDF — malware analysis report

Static analysis result for SHA-256 c7094bf2f142fe95…

MALICIOUS

PDF

71.9 KB Created: 2020-12-16 17:51:53 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-26
MD5: f4e658c82564e82d88fff5706d106726 SHA-1: d54e2482bd42d38a14fe6023e7130b4e5a5321f8 SHA-256: c7094bf2f142fe95bb8e38f43b960ffcc119dba024cc989d23d7244b07795123
156 Risk Score

Malware Insights

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

The PDF file was flagged by multiple heuristics, including ClamAV and an ML classifier, as malicious and phishing-related. It contains an embedded URI pointing to 'trafftec.ru', which is likely a malicious domain used to host phishing content or distribute further malware. The PDF structure also indicates a link farm, suggesting an attempt to manipulate search engine results or distribute links to malicious sites.

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://trafftec.ru/strik?utm_term=idf+diabetes+atlas+4th+edition PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4445880/normal_5fbd09cbde1a5.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4469836/normal_5fd6a88484ac5.pdfIn PDF document text
    • https://pujuwofox.weebly.com/uploads/1/3/4/8/134882524/gomutiwufob.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • https://uploads.strikinglycdn.com/files/670c020d-7036-49e1-8fa6-ea162dc1ab5a/17296379079.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/cf0e25dc-fafc-4cfb-bc60-7a2821fe5a27/xunojokiwuxokavapozi.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc4eddadf132613bbd766a4/t/5fcb68c1551bdc47e7a7e871/1607166145964/fapulasati.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fce45389c32423a38e72f33/t/5fd037333bcf75077a7b2fec/1607481141438/uninstall_vmware_intelligent_hub_android.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc302a66b97992eb569afe6/t/5fc5c890cb3e0f57711883ab/1606797456416/underworld_blood_wars_torrent.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc79caa48c1673e559ddea1/t/5fd6abadd654060362d36425/1607904175382/pipobimurixaxifuborusi.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/47a3d410-dc59-415b-ab3c-3e793bb8546e/18909160369.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/26964da7-241f-4da0-82ff-3dc35bb5c528/jilakemalibajudige.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/61a2899f-7013-4ca0-a336-3c8f9a23ee19/rpg_offline_apk.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/452da391-7b9a-49b5-baf3-3168caff91bc/casa_rural_las_nubes_tripadvisor.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/81599454-1753-42e3-8bb9-228b58c290cc/4044609185.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000ce8a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCE8A 4852 bytes
SHA-256: e9ac45751a9c3ae8f3bba25daf68b693129683f9649c53f7d64be369cc63ac8c
font_01_sfnt_off0000defc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDEFC 11384 bytes
SHA-256: 628200a9742a9c3f025315be2b64f432436e54ac7fc691d1c7dd1eeea5abb217
font_02_sfnt_off000104f8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x104F8 4324 bytes
SHA-256: 4fcfa7c68d76e23b667942a3ac892d2d5d88346478daafc61479ad4df4af3dd3

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