Malicious PDF — malware analysis report

Static analysis result for SHA-256 8607b1d575bc1c07…

MALICIOUS

PDF

74.4 KB Created: 2021-03-10 00:49:44 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-22
MD5: 2e854254a5261dbf789879a3ab1238f8 SHA-1: 2d54c9485493013cf0aae58f1cc08338d927086e SHA-256: 8607b1d575bc1c07b0a048e6bfb24d0125184908eae31ff875ae189c13ca5e1e
186 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 0.9998

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://dafemum.ru/123?utm_term=c+code+format+checker PDF link annotation
    • http://bometaximom.scienceontheweb.net/54438894844.pdfIn PDF document text
    • https://womegirig.weebly.com/uploads/1/3/4/5/134506381/29c622d9d9.pdfIn PDF document text
    • http://selozufuwadapuw.66ghz.com/fipaxase.pdfIn PDF document text
    • https://bogezemobazuv.weebly.com/uploads/1/3/1/8/131856224/lukorabijafetiv_tuwimedowuzaw.pdfIn PDF document text
    • https://nurinakeviwiket.weebly.com/uploads/1/3/1/4/131407921/gefon-vanudodupitu-tomewi-kavolaguf.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://c6926203-1eb9-401e-9afa-11f61f201807.filesusr.com/ugd/685707_5bc9f4b86e564b96a373ec05fc02467f.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/zusevamasor/gigazosewagefojifep.pdfIn PDF document text
    • https://s3.amazonaws.com/daniwodug/92366466751.pdfIn PDF document text
    • http://widepidaba.atwebpages.com/remedubesexumemepavus.pdfIn PDF document text
    • https://8d6920c1-aef5-45ed-b1a0-e693d63948fb.filesusr.com/ugd/0a593f_a337d07fcc6e48dfa4eb6f741b203885.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/072e7192-2b74-49e0-b745-27d9f01e9748/how_to_buy_pre_market_stocks.pdfIn PDF document text
    • http://taroveruwidiba.onlinewebshop.net/78878813170.pdfIn PDF document text
    • https://14535e1a-360a-4d01-a655-fa33e115c80e.filesusr.com/ugd/b222ea_1b5c9b4a95e2452fb9da217797264056.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/12cfd12c-7d61-4133-a04c-b7351b02a79c/itil_intermediate_service_design_exam_questions.pdfIn PDF document text
    • https://8eb0ff2f-1b5f-41fb-a82b-bf279dc7f43e.filesusr.com/ugd/868f76_34bf6e0f64e9429194a2f894a1414e65.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/f12f9623-02e5-4684-b3e4-714adbf05264/recover_facebook_password_without_email_or_phone.pdfIn PDF document text
    • http://geforagegi.atwebpages.com/jividapiligikuja.pdfIn PDF document text
    • http://vokunewegulu.epizy.com/71690674031.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_off0000e6ff.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE6FF 5020 bytes
SHA-256: efa1805b7602297f25aede8ae95a403b5c2ed544ade802da85d76924bcbf3bd4
font_01_sfnt_off0000f7de.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF7DE 10732 bytes
SHA-256: 9269978ecdfc9cc1f4282f8ebd0b9533567b14cd6cf2197906fc19631808d8d3

Open this report in the interactive analyzer, or submit your own file for analysis.