Malicious PDF — malware analysis report

Static analysis result for SHA-256 0ee926355cbceaa4…

MALICIOUS

PDF

79.5 KB Created: 2021-04-08 03:24:26 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-23
MD5: 50621d0c3feff55c7fcaafd4594686f9 SHA-1: ddf5d81dc931de92eb3e0222246961e632aa2bdc SHA-256: 0ee926355cbceaa4113484cf2cfed4ff1f5e622808aeb896a3cf4e105d332277
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://soxebez.ru/strik?utm_term=ionic+vs+covalent+coloring+worksheet PDF link annotation
    • https://janusizexagelu.weebly.com/uploads/1/3/5/3/135337128/lakejugulomekepejo.pdfIn PDF document text
    • https://bibutijelogoper.weebly.com/uploads/1/3/2/7/132740620/tekuvelu_tunudogi.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4472481/normal_602ad1c6ce6cc.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4454995/normal_606953dfcd0aa.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4490547/normal_5fe08d264c50c.pdfIn PDF document text
    • https://gunomelovolif.weebly.com/uploads/1/3/4/7/134735852/1284268.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4420767/normal_605f646b1e1e9.pdfIn PDF document text
    • https://doluduzugemuj.weebly.com/uploads/1/3/1/4/131411539/3becebe9f5c6b7.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4470412/normal_5fe8e5914752c.pdfIn PDF document text
    • https://magajasomit.weebly.com/uploads/1/3/5/3/135388043/pileduraviwin.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4486353/normal_5fdb0b205570e.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/pesetufavo/what_are_the_rules_of_the_internet_reddit.pdfIn PDF document text
    • https://91506351-5699-48ce-85e7-8e7d071f4e87.filesusr.com/ugd/d775a9_a7d934cbf35d49c5ab4f75bbe18d4555.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/lusabifef/hp_officejet_pro_6830_e-all-in-one_printer_series.pdfIn PDF document text
    • https://s3.amazonaws.com/ronatiduzoxij/what_is_the_best_design_app_for_ipad.pdfIn PDF document text
    • https://s3.amazonaws.com/kegovev/the_pact_2002_full_movie.pdfIn PDF document text
    • https://f3dbd103-cf2f-44fc-b0ad-c9004dc38af2.filesusr.com/ugd/1f2646_4237c83ef48042f88bb3a19a18bc4786.pdf?index=trueIn 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_off0000fac2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFAC2 5216 bytes
SHA-256: 491321d78271462de711268ef02921b5c12c7f5f56bb85226e4cd9ac75a8b5c8
font_01_sfnt_off00010c8f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10C8F 10576 bytes
SHA-256: 88fcc61eae1374052f38661fd846256fdc4b81fe54d0a7c6bf3f617d2d4851aa

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