Malicious PDF — malware analysis report

Static analysis result for SHA-256 f4534255e95ac77f…

MALICIOUS

PDF

170.5 KB Created: 2020-12-23 16:00:27 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-26
MD5: c347fa05b540f56c88bdae8dd8a92fbb SHA-1: 1e06efd748590969ade7f23c703e5d41a1ac10a3 SHA-256: f4534255e95ac77fcc9d2a6ab073a25728024e186a269b4bdcf477984c388e6e
154 Risk Score

Malware Insights

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

The PDF contains a critical heuristic firing for a malicious redirector link, specifically pointing to 'https://traffine.ru/123?utm_term=madison+elementary+school+madison+nh'. This URL is presented in a way that suggests a phishing or social engineering attempt, likely to trick the user into visiting a malicious site. No scripts were extracted, but the presence of a malicious URL strongly indicates a phishing attack.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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
  • 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.
  • 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/123?utm_term=madison+elementary+school+madison+nh In PDF document text
    • https://cdn-cms.f-static.net/uploads/4366381/normal_5f8736c5ec74e.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4489839/normal_5fd666268ac97.pdfIn PDF document text
    • https://cdn.sqhk.co/jibenapola/hihfhb0/how_to_win_friends_and_influence_people_audiobook.pdfIn PDF document text
    • https://cdn.sqhk.co/berovanova/RCq1BC8/full_steam_ahead_book_summary.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4383146/normal_5f955d0b7f7c2.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366364/normal_5f873ba64dbc0.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/6a32a7b0-8aef-432d-a8f7-b88acbeb5b3d/8_ball_pool_unlimited_cues_mod_apk_download.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/56fad776-6b27-4d43-a7f8-84cd8a29817d/vixuvuviworetetujog.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/6f22bdd9-3e75-4781-8447-929261639ce5/2016_nissan_frontier_owners_manual.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/bd06d862-c81a-4d75-b3c3-bfcfa30cebbf/tirumabed.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/4a87c34e-8a51-4137-a4d3-aef07364b391/nokurak.pdfIn PDF document text
    • https://s3.amazonaws.com/poresi/51673417774.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/de28b38e-5eb4-44bc-8e65-f8415f686f7c/six_minute_solution_primary_passages.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/0fa0545b-8600-415c-8e8e-fad6e1be26d0/43078146836.pdfIn PDF document text
    • https://s3.amazonaws.com/sazomo/lexegibumowenaso.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/8a1f35f6-a937-4a9c-b9a5-3d2d10bee5ed/45868680579.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_off00026586.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x26586 5284 bytes
SHA-256: 66221de75214d65b0b3dbd80d88a03bc1ab3349d116afe5421a1489b2a50d91f
font_01_sfnt_off00027763.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x27763 10908 bytes
SHA-256: 31b75736e52bcd9442c97723577719150a0b2b1dd3e61f0be9b27f19a06add36

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