Malicious PDF — malware analysis report

Static analysis result for SHA-256 80e84666e979fa75…

MALICIOUS

PDF

78.7 KB Created: 2021-05-07 08:45:13 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-22
MD5: 1486053e33a274ee1eadde913127a4c4 SHA-1: c51ce41cc46edb12e8ed2f6a4fb3c7f590a2143e SHA-256: 80e84666e979fa751519da10ad12ca831f99e53c8171f67f01de882514ab4c64
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://crophysi.ru/strik?utm_term=how+to+bookkeeping+basics PDF link annotation
    • https://static.s123-cdn-static.com/uploads/4366305/normal_5fe0d80919526.pdfIn PDF document text
    • http://freud.icu/bow_tie_pasta_with_pesto_and_pine_nutsr0n2o.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4412599/normal_6069db3b9af94.pdfIn PDF document text
    • https://cdn.sqhk.co/fusajovogi/bRhbmij/88179998731.pdfIn PDF document text
    • https://cdn.sqhk.co/posojuvapono/8ggfKXi/41827484032.pdfIn PDF document text
    • http://posadukik.getenjoyment.net/73593805620.pdfIn PDF document text
    • https://cdn.sqhk.co/gogerazina/ITOvDhg/77475915316.pdfIn PDF document text
    • https://cdn.sqhk.co/bogovureg/ngehfM1/37525492724.pdfIn PDF document text
    • http://basiditdcf.space/luwuwozunemilazvdtwo.pdfIn PDF document text
    • http://lezofifividex.scienceontheweb.net/bsc_nursing_syllabus_2020.pdfIn PDF document text
    • http://hocostyle.ru/mupadinovopitapuwox42ho0.pdfIn PDF document text
    • http://douchehq.xyz/witovitotudezexenunitiwhq590.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://kimoviranonaf.onlinewebshop.net/rotuzasose.pdfIn PDF document text
    • https://05491ccc-77c7-428b-9c25-74f2c6c50d4a.filesusr.com/ugd/d51d36_40944acad2df406fab31394a580a3e92.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/2e11d9f7-5577-4a70-bca5-71e09644af67/27893986435.pdfIn PDF document text
    • https://8d40832c-2e2b-4284-8151-bb35a16d80ac.filesusr.com/ugd/05d014_db3f0d5a79c74cddbc9a15c29685bb9b.pdf?index=trueIn PDF document text
    • http://limoxukuk.atwebpages.com/68733418547.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/e3918971-7545-45ad-83bc-a95dc429da48/how_to_make_6_figures_in_6_months.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/4b179eae-941a-49bf-b0ae-693110ef3f91/17115975006.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

Related samples 3

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000f635.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF635 5232 bytes
SHA-256: 5ae98f0b03022f7cd5eed056bb40a948ed1f613616e52ab4366bbf331773b4a3
font_01_sfnt_off0001082e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1082E 11072 bytes
SHA-256: 6150ff285aefa2d3c55ae89bac981ae45bcdf0cb5bd20e42fca76cf84147a674

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