Malicious PDF — malware analysis report

Static analysis result for SHA-256 7ce74f94cdfb7378…

MALICIOUS

PDF

69.5 KB Created: 2021-03-28 05:20:03 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-23
MD5: f06d0e5bf3be0f78ca42916543af2fbb SHA-1: b4de3dcc80b2d55c74f5e5473432796fefd7ca81 SHA-256: 7ce74f94cdfb7378db49736b480aaf8554cedfa87674887718346321c57b419c
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://gimoguvi.ru/award?keyword=an+illustrated+history+of+islamic+architecture+pdf PDF link annotation
    • https://temazojirilezin.weebly.com/uploads/1/3/2/3/132302863/592fdfa7d4d789a.pdfIn PDF document text
    • https://lomodujumozib.weebly.com/uploads/1/3/4/5/134588848/cc15100228ab3.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4490274/normal_600f75e4c61b9.pdfIn PDF document text
    • http://rivilidopu.medianewsonline.com/mupira.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4392462/normal_601fd8513611d.pdfIn PDF document text
    • https://pexerewiku.weebly.com/uploads/1/3/5/3/135313352/dibugol-vasep-pomovapegexap.pdfIn PDF document text
    • http://joriwolujuf.sportsontheweb.net/how_to_add_a_video_background_to_wix.pdfIn PDF document text
    • http://wejuzofibab.medianewsonline.com/60116939912.pdfIn PDF document text
    • https://manapefowuv.weebly.com/uploads/1/3/4/6/134605974/xuxamorizimaw.pdfIn PDF document text
    • http://rijewomel.scienceontheweb.net/bibigixumadari.pdfIn PDF document text
    • http://pajuwepubawip.sportsontheweb.net/73348722000.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://josuxak.atwebpages.com/dimasuwineselodulazuwado.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/de7dae3f-564f-4a79-967e-2823b52df8d8/how_to_sleep_navy.pdfIn PDF document text
    • http://piwakitidi.onlinewebshop.net/3936577398.pdfIn PDF document text
    • https://8b2103c5-345b-48fd-98e3-f19c90c4efd0.filesusr.com/ugd/0e2875_272883117d2f433e8a507e7c004a2c34.pdf?index=trueIn PDF document text
    • http://mejumobax.atwebpages.com/77134475897.pdfIn PDF document text
    • https://e33362eb-94ba-4427-a888-6f4863169a18.filesusr.com/ugd/36ce96_efceec63c14e4a13bcf95ef79978f3e5.pdf?index=trueIn PDF document text
    • http://farudigenudoze.onlinewebshop.net/81193126889.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/b1616ab5-8790-4444-a48a-03c2c16a5ecd/17073107636.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/17eef22a-ef88-4e51-a72f-2746d02a2456/mironaxiwudito.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_off0000d286.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD286 5484 bytes
SHA-256: b11414ce48fa5e6f4bcc20ffa662db1eba982bf24078e976e0d9b629a7daacad
font_01_sfnt_off0000e50e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE50E 10184 bytes
SHA-256: 77b9eb97e893b045cd1abf90ccf22de5ce92930b9053873c5366bc081f298e33

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