Malicious PDF — malware analysis report

Static analysis result for SHA-256 bbb1f1228511ee17…

MALICIOUS

PDF

66.8 KB Created: 2020-12-02 12:51:08 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-05
MD5: c729b689abac6240ce598fc7dbf9b3cd SHA-1: 62ee00c1cc5e41b21bb7a9cc8b0e25278a266927 SHA-256: bbb1f1228511ee17e8af96db9482561172f8582d1c79ede138a4517236e07b59
96 Risk Score

Malware Insights

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

The PDF file contains an embedded URL pointing to a domain associated with malware distribution, disguised as a free download for an application. The ML classifier and ClamAV detection strongly indicate malicious intent. The document body, though partially garbled, references 'supersu me apk free download', reinforcing the lure.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9995

Heuristics 4

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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://traffine.ru/strik?utm_term=supersu+me+apk+free+download PDF link annotation
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://uploads.strikinglycdn.com/files/87061554-35ab-4c30-b568-4d7ecf2d5730/nevada_cosmetology_license_lookup.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/904f66ef-4468-45eb-9217-d307cd6c6eef/ap_gov_review_2019.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/8930166a-9e5a-497b-9098-86e627126ef1/boy_scout_rifle_merit_badge_counselor_requirements.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fbce344be7cfc36344e8aaf/t/5fbd1f86de24616dd48ed15b/1606229895362/vba_for_dummies_excel.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/088c6bc4-bf1e-4a48-9c81-5c6d249f8da3/28010584322.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc4d1c52cf09257bd84ca4b/t/5fc54cb5fa04221c71cec77b/1606765750159/bilolunemedolazujironel.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc0cc6dc14dfd36fef0f123/t/5fc0ee46f3de5e49b586027a/1606479432245/10211685038.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/e4b2b7a7-0705-42cd-ae8d-c98ea496e452/dakijuna.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/aaff76ad-526a-427c-97b5-41eb77904967/5831843503.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/f0525005-79c4-40a9-a8e7-094d4e46a991/fijin.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_off0000c8b5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC8B5 5448 bytes
SHA-256: cc1005e3ae2ad69646f74aa7c901e686532e2faf557babb52ec4796f5ddf9419
font_01_sfnt_off0000db38.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDB38 10456 bytes
SHA-256: 1b88a03b36be1f65cba0427a1d0e5de425de1fc9b8331b2daaea2a6952ec5f15