Malicious PDF — malware analysis report

Static analysis result for SHA-256 a26267eaa9eba9cc…

MALICIOUS

PDF

69.8 KB Created: 2021-06-11 06:58:51 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-13
MD5: bdfa2045cbf29acf2aed15ade4253dbb SHA-1: cfdee829b9c3bd25a4e18ed3a9aa2d717029838a SHA-256: a26267eaa9eba9cc98b5b027fcd7cef462e0cbfa45e1cf9869b735a55a81d413
186 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

This PDF document contains a large number of external links, many of which are hosted on disposable domains, indicating a link farm or phishing attempt. The primary URL, 'https://catamma.ru/pbw?utm_term=sai+ram+sai+shyam+sai+bhagwan+full+song', suggests a lure related to song lyrics to entice users to click. The ML classifier and ClamAV detection strongly indicate malicious intent, likely for phishing or malware distribution.

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://catamma.ru/pbw?utm_term=sai+ram+sai+shyam+sai+bhagwan+full+song PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4445877/normal_60536b6c60ea6.pdfIn PDF document text
    • https://static.s123-cdn-static-d.com/uploads/4450042/normal_60b7018512b4c.pdfIn PDF document text
    • https://japiravonasuv.weebly.com/uploads/1/3/4/6/134644749/bumovo.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4475383/normal_6047a71706e7a.pdfIn PDF document text
    • https://zutuvibob.weebly.com/uploads/1/3/1/4/131407898/gevobaxamigenemilufo.pdfIn PDF document text
    • https://patijunig.weebly.com/uploads/1/3/0/9/130969449/325361.pdfIn PDF document text
    • https://lefagetali.weebly.com/uploads/1/3/2/3/132302894/bejoxutipawun.pdfIn PDF document text
    • https://vefawotujetebab.weebly.com/uploads/1/3/4/6/134651081/7beca.pdfIn PDF document text
    • https://diziwupufetut.weebly.com/uploads/1/3/4/4/134477772/dekolima.pdfIn PDF document text
    • https://jurojapelo.weebly.com/uploads/1/3/4/8/134878956/5059510.pdfIn PDF document text
    • https://goxejebifebiv.weebly.com/uploads/1/3/2/6/132682819/niwewekekez.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4489588/normal_5feda99b5fc18.pdfIn PDF document text
    • https://fegopamaxu.weebly.com/uploads/1/3/4/8/134896151/xegepamidifule.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4485689/normal_605f60002433d.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://togiwuvoze.pbworks.com/w/file/fetch/144579555/veteremetituvo.pdfIn PDF document text
    • http://negovijalulu.pbworks.com/f/dewudukerokurusilof.pdfIn PDF document text
    • http://bupataved.pbworks.com/f/asphalt_8_hack_mod_for_pc.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_off0000d55c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD55C 5616 bytes
SHA-256: d8586ed32e8f8e681c256a583907a89a8b2484b0afc9abe9e296ad99063d55a8
font_01_sfnt_off0000e861.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE861 9748 bytes
SHA-256: b38e5b475b0ad0f81a201b3b32986fd36a4b425d50f45cb30cf1887813922c65

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