Malicious PDF — malware analysis report

Static analysis result for SHA-256 c3c46a0b5327131e…

MALICIOUS

PDF

68.6 KB Created: 2020-11-23 04:51:07 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-26
MD5: 789f01085b48dae36bf922e73fe2c908 SHA-1: 92b8a1263896ddc4b8f1cfa4617947fa4006770d SHA-256: c3c46a0b5327131e1581e55b5c983697707528218aa53b8318ea4e009f43d2ba
186 Risk Score

Malware Insights

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

This PDF file was identified as malicious by ClamAV and an ML classifier. It contains a large number of external links, many hosted on disposable domains, suggesting a link farm or SEO manipulation tactic. One of the embedded URLs, 'https://trafftec.ru/123?utm_term=girl+vs+monster+disney+cast', appears to be a lure to direct users to potentially malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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
  • 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.
  • 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://trafftec.ru/123?utm_term=girl+vs+monster+disney+cast PDF link annotation
    • https://vixijusodu.weebly.com/uploads/1/3/0/7/130776714/9731026.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4368506/normal_5f951c237a455.pdfIn PDF document text
    • https://gimejexoxixaza.weebly.com/uploads/1/3/1/8/131872185/jinitorip-bolag.pdfIn PDF document text
    • https://dexoxewivovevub.weebly.com/uploads/1/3/4/3/134322619/fugeberovonexa.pdfIn PDF document text
    • https://namazowofurap.weebly.com/uploads/1/3/4/3/134372349/56bc8f.pdfIn PDF document text
    • https://jipidonano.weebly.com/uploads/1/3/4/3/134340070/metozefelojek-dilawazobuguzo-vodidomedu-vapuvexopu.pdfIn PDF document text
    • https://sakafafemowuva.weebly.com/uploads/1/3/4/6/134694971/5459777.pdfIn PDF document text
    • https://giduwuxudi.weebly.com/uploads/1/3/4/7/134716719/robazuji.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366982/normal_5f8d37ee2ba7b.pdfIn PDF document text
    • https://luvoseguz.weebly.com/uploads/1/3/4/6/134665560/muxekifaje.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/jenisozazewubo/71314412503.pdfIn PDF document text
    • https://s3.amazonaws.com/nonipesikiri/13406750477.pdfIn PDF document text
    • https://s3.amazonaws.com/pajukovuxetu/street_fighter_2_ryu_vs_sagat.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/eed495aa-e607-468d-830b-ba105707d7d1/ti-_89_emulator_online.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/eb52086e-ae4b-487a-9785-3185db8a37e2/pubekewitijetupi.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_off0000ceca.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCECA 5276 bytes
SHA-256: 68e6e20dfeecaeb01e4d398425841b6db5af2b62ab7c73302a18613a934dd9f3
font_01_sfnt_off0000e0b1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE0B1 10920 bytes
SHA-256: 73f5885a8583a62835572d387fc0e92ed06e1f122a1b27709e8a177e94a1a43b

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