Malicious PDF — malware analysis report

Static analysis result for SHA-256 b0296a99d539e648…

MALICIOUS

PDF

66.7 KB Created: 2021-04-14 20:56:14 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-27
MD5: a68b68e3baf288296974d9d1463f1607 SHA-1: 587bda2a93f0ca60f12647a92749fb7a26746786 SHA-256: b0296a99d539e648d3dc3841513f6efa9659a746f9f57c0153296ba9ae662aed
126 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

The PDF contains numerous embedded URLs, many pointing to disposable domains and employing UTM parameters, which is characteristic of phishing or malware distribution campaigns. The ML classifier and ClamAV detection strongly indicate malicious intent. While no scripts were explicitly extracted, the PDF structure and embedded links suggest it's designed to redirect users to malicious sites, likely as part of a phishing or credential harvesting operation.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://xezojetit.ru/strik?utm_term=whirlpool+wdf320padw1+control+board PDF link annotation
    • https://cdn.sqhk.co/vifamepupib/5pJiep8/mancala_online_two_player.pdfIn PDF document text
    • http://gopudumimipabol.mypressonline.com/wupixodi.pdfIn PDF document text
    • https://cdn.sqhk.co/jomonufo/Ejd3hhE/business_calendar_2_apple.pdfIn PDF document text
    • http://gavokofubafixi.getenjoyment.net/likirufudegeb.pdfIn PDF document text
    • https://cdn.sqhk.co/letarezetap/iihhef5/96373328558.pdfIn PDF document text
    • https://nenubijul.weebly.com/uploads/1/3/5/3/135393623/setufu.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4449410/normal_5fcf60b210f02.pdfIn PDF document text
    • https://cdn.sqhk.co/sunomedude/xOif4eV/wuvexogafuvufitoxozefop.pdfIn PDF document text
    • https://nudiwosesi.weebly.com/uploads/1/3/4/3/134317077/2942357.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4366388/normal_5fee7440be7a2.pdfIn PDF document text
    • http://milatepe.medianewsonline.com/adobe_xd_tutorial_web_design.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4404520/normal_5fc59c4f616ff.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4368985/normal_604f48ad64eec.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://tafiwepamubov.atwebpages.com/mawinexirun.pdfIn PDF document text
    • http://bovinow.epizy.com/free_printable_fractions_to_decimals_worksheets.pdfIn PDF document text
    • https://s3.amazonaws.com/lixuduwonifa/cant_stop_wont_stop_lyrics_miley_cyrus.pdfIn PDF document text
    • https://s3.amazonaws.com/gowupuzokowuxes/geology_journal_guide_for_authors.pdfIn PDF document text
    • http://lomizawok.epizy.com/34673607619.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_off0000c84b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC84B 5800 bytes
SHA-256: d4dba8d95548e32128218985f9f7f6df37101cd6180cd4181f0af60de2446826
font_01_sfnt_off0000dc1c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDC1C 9832 bytes
SHA-256: 3d51f372a981fa30b458a7608cf36b06ca5ec35956c6a6961008ea450c7c775c

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