Malicious PDF — malware analysis report

Static analysis result for SHA-256 081155a8891761c0…

MALICIOUS

PDF

67.5 KB Created: 2020-12-01 23:07:32 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-23
MD5: 465c38ecd718bca90d6d6f077a4caf6e SHA-1: d82199d132c498ecef8ff226135235b99065d21b SHA-256: 081155a8891761c04b7c1072ffb2ae54ab298c266ab069dd2f60243e4b5c6429
96 Risk Score

Malware Insights

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

The PDF file was detected as malicious by ClamAV and an ML classifier, and it contains an embedded URL pointing to a suspicious domain. The document body, though heavily obfuscated, suggests a lure related to 'game hack tool apk', aligning with a phishing or social engineering attack. No scripts were extracted, but the presence of an external URI is a strong indicator of malicious intent.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 4

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://trafffi.ru/strik?utm_term=game+hack+tool+apk PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4488323/normal_5fc1e76c2630c.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4495055/normal_5fc1668a40d45.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4387573/normal_5f96fcd298dc1.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4370278/normal_5fc329a8af259.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/295040fb-a1ff-4566-9ef2-f0233466470a/ripuxutuledebexawoberi.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/93bffc8c-2519-4760-b257-c2f3f7de370d/vc_generator_nba_2k16_no_survey.pdfIn PDF document text
    • https://s3.amazonaws.com/saxefi/vexapozu.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/c64559ea-8f41-4212-9f48-1a4cccc77e42/u8_smart_watch_instructions.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/8d6b776c-e2cd-471c-8642-3d8ad9bbb10c/73064597709.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/eff9f6cc-b934-4eec-9671-427eda7e468e/zizofob.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc0d446ab79f442f2293e00/t/5fc3df5861e25426e1aee9a6/1606672216533/spontaneous_recovery_ap_psychology.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/8cf52951-442c-4a0f-b1aa-1afd9da8c435/55837879690.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_off0000cbf5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCBF5 4992 bytes
SHA-256: f745e669626fd657a0251ac37fd5584c44eec070f2ae41d1cfbb1f91cf0490d4
font_01_sfnt_off0000dcd4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDCD4 10772 bytes
SHA-256: d4d00416c55e53d313c881207a1288f05dc993c86d204edfecbd2014bfd0b65a