Malicious PDF — malware analysis report

Static analysis result for SHA-256 0782a24451f3c5c4…

MALICIOUS

PDF

81.7 KB Created: 2020-12-19 11:07:09 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-27
MD5: 424266c9abdc1da97a442056dabc1a5f SHA-1: d9b380c54d1e49e770aba541e70dff23c8b442f9 SHA-256: 0782a24451f3c5c45eb7d4a7e6459a86f8c8d7b55dea9715053616b09fa8252e
244 Risk Score

Malware Insights

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

This PDF file was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. It contains a link farm with multiple URLs, including a known malicious redirector at 'ggtraff.ru'. The document's structure and embedded links suggest it is designed to lead users to potentially harmful websites, likely for phishing or malware distribution. No scripts were extracted, but the presence of numerous external links points to an attempt to redirect the user.

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 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.
  • 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.
  • 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://ggtraff.ru/strik?utm_term=advanced+dungeons+and+dragons+handbook+pdf In PDF document text
    • https://gejovekozeja.weebly.com/uploads/1/3/4/4/134401956/d8db5910.pdfIn PDF document text
    • https://jakinamil.weebly.com/uploads/1/3/4/3/134391996/2073367.pdfIn PDF document text
    • https://vebajixumese.weebly.com/uploads/1/3/4/4/134483039/dfc80a3af7c.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4371498/normal_5fc6cd8044068.pdfIn PDF document text
    • https://tefuxaforubexo.weebly.com/uploads/1/3/4/4/134446539/zipot.pdfIn PDF document text
    • https://lizapomed.weebly.com/uploads/1/3/4/5/134511268/6024078.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/de0fbc41-1049-412a-b25b-e3217d94ad5c/guxifugelipujafoketivuma.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/434fee8b-3bad-4b14-87b2-b1cdfa9464b7/71455205474.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc4f2670a2757459bfcd987/t/5fcc56add336b863f0b841fc/1607227054572/vlc_media_player_apk_android_2._3.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/62220f6e-aca3-4dcc-8741-db6e252cb04b/gusiduvipepen.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/bab0627d-e0b6-4ec9-aab1-73154477de47/rulerigoxadejafijor.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_off0000f3db.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF3DB 5392 bytes
SHA-256: 244de2e1778442fdb9be0919b7f4b3247f9fbc42b4bbd6267ab3d01a67c24a1c
font_01_sfnt_off0001061b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1061B 11396 bytes
SHA-256: 0a00f6b2ccdc2c482801e2aee6ade75738f88e4d852187a6c9199a3a38b50308
font_02_sfnt_off00012ba1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12BA1 4324 bytes
SHA-256: 7f6049e5011acf0e8581793f2bc2bb947aac2929fdb77abc318b2a6155c1ef71

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