Malicious PDF — malware analysis report

Static analysis result for SHA-256 fc916d2954f720c6…

MALICIOUS

PDF

38.0 KB Created: 2020-11-06 21:34:09 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-03
MD5: 9d3b71a8fab296be599849036208e45d SHA-1: 4afca78a2f4d20d52a91272bf63217271a119169 SHA-256: fc916d2954f720c665b6d8110a47c1b9a9a8aade4e0e91fb75dc8b2f069302a9
66 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

The PDF document contains numerous embedded URLs, many of which point to disposable hosting services and are associated with link farms. The primary URL, 'https://trafficel.ru/aws?keyword=imvu+credit+generator+no+download+no+survey', suggests a lure for users seeking free credits, indicating a phishing or scam attempt. The ML classifier strongly flagged this PDF as malicious, supporting the assessment of a malicious intent.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 4

  • 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://trafficel.ru/aws?keyword=imvu+credit+generator+no+download+no+survey PDF link annotation
    • https://woliremokeg.weebly.com/uploads/1/3/4/3/134340334/3eb0cb3976.pdfIn PDF document text
    • https://kisuwirabavaruz.weebly.com/uploads/1/3/3/9/133999170/b197864ba.pdfIn PDF document text
    • https://zegojipoxe.weebly.com/uploads/1/3/1/0/131069766/rizekerevinidul.pdfIn PDF document text
    • https://zirasave.weebly.com/uploads/1/3/4/0/134096010/vumodawukakaner.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4413835/normal_5fa1439cd23ec.pdfIn PDF document text
    • https://fimuxexepal.weebly.com/uploads/1/3/4/6/134615427/kiseruvofalana_sewunixubore_rezofeninivamen.pdfIn PDF document text
    • https://wosezobar.weebly.com/uploads/1/3/1/8/131856012/cc4ce4fd64a789.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/6e1035fd-e40d-4507-a04b-6daf41c15e79/minecraft_2.0_apk_mediafire.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/0a4e4bc1-149e-4c72-9e2e-675c04b936fe/81191712019.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/2326386e-d237-41cd-a91e-a0044d4e3433/detective_conan_movie_23_the_fist_of.pdfIn PDF document text
    • https://saxofenofam.files.wordpress.com/2020/11/lafinunejojamev.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_off00005716.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5716 5448 bytes
SHA-256: c077f6a6102adacfd60f0f04625676e4dad126859813fc6fd5163c66ec4959c7
font_01_sfnt_off000069a2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x69A2 9980 bytes
SHA-256: d2442de1584ee2e13c0a4b637a8990ee06ff314885636a9205fe7bbed827abd5

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