Malicious PDF — malware analysis report

Static analysis result for SHA-256 17903b82d5d1e189…

MALICIOUS

PDF

91.9 KB Created: 2021-03-25 17:23:42 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-23
MD5: 546dcdee4409bed2683b148e3f1fca9c SHA-1: b59a6706c49d148f32c8270c425828b496601dc5 SHA-256: 17903b82d5d1e189228cd3d69c109517d9e8933c38f4cae4e8c08ffbd3ecfefa
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 0.9996

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://leonvi.ru/strik?utm_term=the+adventures+of+sherlock+holmes+short+stories+pdf PDF link annotation
    • https://viramerobudob.weebly.com/uploads/1/3/1/4/131483281/c5001f.pdfIn PDF document text
    • https://giwulotasika.weebly.com/uploads/1/3/1/4/131411199/tabubikofi.pdfIn PDF document text
    • https://boliminukedakos.weebly.com/uploads/1/3/4/4/134494229/2388208.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4421944/normal_6047d65920bef.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4501659/normal_5fef55c2ee411.pdfIn PDF document text
    • https://pasadaxadug.weebly.com/uploads/1/3/5/3/135390708/a1238b1e0d7eb11.pdfIn PDF document text
    • https://rofasaxoropop.weebly.com/uploads/1/3/5/3/135316675/migagolebol_zedexuzafo.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4474445/normal_5fd7b24181d3f.pdfIn PDF document text
    • http://wovemabib.iblogger.org/94207331575.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366388/normal_60243f6d7ed1d.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4379359/normal_602954e28f6c4.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4461234/normal_600a8e0d34f7a.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4456393/normal_5ff598f86ec85.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4426679/normal_5ff4cb5312e55.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4484609/normal_5fe91d8dd908c.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4460460/normal_5fe42805baa40.pdfIn PDF document text
    • http://vobarijijagurar.22web.org/junior_architect_cv.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://kujafugakare.epizy.com/68647074335.pdfIn PDF document text
    • http://kisolapuri.rf.gd/34272922473.pdfIn PDF document text
    • http://dolapevina.rf.gd/crunchyroll_premium_free.pdfIn PDF document text
    • http://kutugujipix.epizy.com/ielts_writing_band_7_model_answer.pdfIn PDF document text
    • http://vofofoduwegakuv.rf.gd/philips_aquatouch_wet_dry_shaver_manual.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_off00012a48.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12A48 5468 bytes
SHA-256: d45c2ecdb0ca4b1e006192de8685d226c1ac1535ce997de2ae6684924462e51e
font_01_sfnt_off00013cc6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13CC6 11048 bytes
SHA-256: cac348d6b50a203e2edc2adea6d03b5b1756a3b46667a26124171ad5aac9b93d

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