Malicious PDF — malware analysis report

Static analysis result for SHA-256 55dca88ee7b517f7…

MALICIOUS

PDF

78.2 KB Created: 2021-01-15 01:15:11 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-06-05
MD5: 0de1da3548f7ceec3263e81208507f3d SHA-1: 8a1163308d86c1e59dc463d9d455eb725c88b653 SHA-256: 55dca88ee7b517f7a980229dc0b71f3a737597470dfc1232073fa93e1239dc73
192 Risk Score

Malware Insights

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

The PDF contains multiple links to external websites, with at least one identified as a malicious redirector. The presence of a 'download' button lure and the ML classifier's high confidence score indicate a malicious intent to redirect users to potentially harmful content. Although no scripts were explicitly extracted, the PDF structure and embedded links strongly suggest it's designed to lead users to phishing or malware hosting sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

Heuristics 6

  • 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.
  • Small PDF is a non-clustered link farm on disposable hosting medium PDF_SEO_DISPOSABLE_LINK_FARM
    Small PDF contains many clickable external PDF links spread thin across many distinct hosts (no single dominant host), corroborated by a utm_term SEO-redirector link and/or links parked on free/disposable content hosts. This is the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains, rather than a normal document citation pattern. The PDF itself carries no exploit — the risk is the linked destinations.
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • 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://traffking.ru/aws?utm_term=chapter+2+review+answers+science In PDF document text
    • https://xajupodesuze.weebly.com/uploads/1/3/1/3/131380723/zujomoxav.pdfIn PDF document text
    • https://site-1249670.mozfiles.com/files/1249670/fovavup.pdfIn PDF document text
    • https://site-1168371.mozfiles.com/files/1168371/aerox_2020_white.pdfIn PDF document text
    • https://vufumepuzatine.weebly.com/uploads/1/3/5/3/135335191/setaxofigojenodux.pdfIn PDF document text
    • https://pulisojoperun.weebly.com/uploads/1/3/4/4/134487891/fovivoradasok-weguviferoxe-velafuwagibixap-xoziwurasefeti.pdfIn PDF document text
    • https://site-1216802.mozfiles.com/files/1216802/nosusijaralifovomikewak.pdfIn PDF document text
    • https://kezobonuduwu.weebly.com/uploads/1/3/4/4/134457579/kolewab-losugufipudomi.pdfIn PDF document text
    • https://site-1178069.mozfiles.com/files/1178069/highway_to_heaven_season_1_episode_7_cast.pdfIn PDF document text
    • https://cdn.sqhk.co/sekeniti/BIjgfgg/swordfish_attack_shark.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://s3.amazonaws.com/jujadodedaruxix/algebra_solving_equations_worksheet.pdfIn PDF document text
    • https://s3.amazonaws.com/sixenogafopoj/51099927194.pdfIn PDF document text
    • https://s3.amazonaws.com/rexogeguxosix/63218744343.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_off0000e760.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE760 4976 bytes
SHA-256: c79dadf04d8ebe43420ed1061faf43ddfb7202203cd3897142a6f2c25c47176d
font_01_sfnt_off0000f852.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF852 11152 bytes
SHA-256: b00265af853a01633cfe629c10c27d31cfd05a4c9f193e98d4e253d35e248c08
font_02_sfnt_off00011d8c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11D8C 4324 bytes
SHA-256: cd94ef65598b1866d0653cdd88243d989fd81359c0e770c2d3a4858f1c2f6d34

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