Malicious PDF — malware analysis report

Static analysis result for SHA-256 c0c62b1fc86b93c6…

MALICIOUS

PDF

69.6 KB Created: 2020-11-14 10:33:39 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-04
MD5: c7e99a1a10729a6c3568a2b85b1de492 SHA-1: 2df2aa132789c116e98a7263d2975a967839a332 SHA-256: c0c62b1fc86b93c697a771ca65117b6f12ceb99138c02f9d2e4bd66c6fcad030
156 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

This PDF document was flagged as malicious by ClamAV and an ML classifier. The file embeds a large number of external links characteristic of an SEO link farm. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

Heuristics 5

  • 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.
  • 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://traffine.ru/strik?utm_term=roku+tv+screen+mirroring PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4374177/normal_5fa2e8a832cb8.pdfIn PDF document text
    • https://takatika.weebly.com/uploads/1/3/4/6/134605824/fevagamew-rubinomozib-kaxat-pukiziwofabum.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/e516193e-29eb-4035-ab2e-4361927c267a/70480612245.pdfIn PDF document text
    • https://s3.amazonaws.com/dotivaf/kakurovovo.pdfIn PDF document text
    • https://s3.amazonaws.com/gizonukorad/tafimofutad.pdfIn PDF document text
    • https://s3.amazonaws.com/jukoxisojow/amphiprotic_species.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/8e58351f-05b8-4885-ad14-4e797a1546cc/nimor.pdfIn PDF document text
    • https://s3.amazonaws.com/gupuso/interview_questions_and_answers_for_freshers.pdfIn PDF document text
    • https://s3.amazonaws.com/ravuxudibure/battle_brothers_perks_guide.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/1945d4ef-8c59-4e79-a258-6c0e8af7d770/81491713367.pdfIn PDF document text
    • https://s3.amazonaws.com/tanikanaw/fear_of_losing_someone_you_love.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_off0000c6ad.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC6AD 4892 bytes
SHA-256: 0df1468da8a60a21e10e433eb8ae49e4799ab845f017078bc17ae14aa8ede4dd
font_01_sfnt_off0000d74d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD74D 10900 bytes
SHA-256: c6efe648b9dafee600dc8babeb8a1a39d1cba909e91214bea92ebb355b895223
font_02_sfnt_off0000fbf8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFBF8 4324 bytes
SHA-256: 0d0f64e27578eb124b8bc81c7eceacdd166e22eddd95c81328e9fbd7de2a6333

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