Malicious PDF — malware analysis report

Static analysis result for SHA-256 1f05c37665415ac0…

MALICIOUS

PDF

185.8 KB Created: 2021-06-18 15:09:20 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-27
MD5: 8822904580007602f8b76e745870f78a SHA-1: 5157d1e73d959de9f7d95d9517ffbefc7f278360 SHA-256: 1f05c37665415ac00be2403e2168a3b9d15be1c7d7ecf190042094fb095b01f3
156 Risk Score

Malware Insights

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

The PDF file contains numerous links to external websites, many of which are hosted on compromised CMS platforms or disposable domains, indicating a link farm for phishing or malware distribution. The ML classifier and ClamAV detection strongly suggest malicious intent. Although no scripts were explicitly extracted, the PDF structure and link farm behavior are indicative of malicious document techniques.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9984

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
  • PDF link farm points to compromised-WordPress upload storage medium PDF_COMPROMISED_CMS_UPLOAD_LINK_FARM
    PDF contains multiple clickable links, across many distinct hosts, whose targets are random-slug files parked in the upload directories of vulnerable WordPress form plugins (FormCraft, Super Forms). This is the hallmark of the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains hosted on compromised sites. The PDF itself carries no exploit — the risk is the linked destinations.
  • 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://zlatartopalovic.rs//files/30329539583.pdf In PDF document text
    • http://asirius.su/wp-content/plugins/super-forms/uploads/php/files/a2c5c9794194bf100977e8338b58b2fd/kupobiputalofaxufin.pdfIn PDF document text
    • http://merwepizza.com/upload/file/dowiluzurufe.pdfIn PDF document text
    • https://kassa-evotor.ru/wp-content/plugins/super-forms/uploads/php/files/orfm888hbs6gmtl2vo74rt1v23/jixuvaloziz.pdfIn PDF document text
    • http://technoculture.cz/admin/upload/file/55843784834.pdfIn PDF document text
    • https://www.areatransfers.com/wp-content/plugins/formcraft/file-upload/server/content/files/160abcfc35c782---27809171917.pdfIn PDF document text
    • https://weblative.com/wp-content/plugins/super-forms/uploads/php/files/3ip8u2bof0n1avpdioakcc76o3/81060611108.pdfIn PDF document text
    • http://www.akutrans.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a0ea989cfb0---tesemererig.pdfIn PDF document text
    • https://vernadoc.com/wp-content/plugins/super-forms/uploads/php/files/0d6d50a009edf82fbb78b9e01a61936f/25765634276.pdfIn PDF document text
    • https://growlocals.com/wp-content/plugins/super-forms/uploads/php/files/ba05f62c62951928ac5670988d374bb6/10095669040.pdfIn PDF document text
    • https://www.ideaklinikkadikoy.com/wp-content/plugins/formcraft/file-upload/server/content/files/160bd0a6609695---96234734332.pdfIn PDF document text
    • https://www.sblending.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/160c6c5b90fb10---lafizawemakebokef.pdfIn PDF document text
    • https://www.superioreagle.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607ca4627947d---57044624143.pdfIn PDF document text
    • http://investin-khj.ir/ckfinder/userfiles/files/mokapanivomoken.pdfIn PDF document text
    • https://propbrains.com/wp-content/plugins/super-forms/uploads/php/files/ddf4ncqsvd1hgsn84o88k5cl12/60366289383.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/1KS0DP0cxss/uplcv?utm_term=naruto+shippuden+pdf+mangaPDF link annotation
    • 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
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Related samples 8

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

Full JSON: related samples API

Extracted artifacts 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00027ceb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x27CEB 3464 bytes
SHA-256: 5e0a24a3d2a4112ee074808c74548d8afe2c3e8e97881c3cc3b8f78192bd4fa0
font_01_sfnt_off0002895d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x2895D 5392 bytes
SHA-256: c2c361cc112fecede43612796c1967aa01f3cc1244a83ffb9c23eb7abc7bbc55
font_02_sfnt_off00029b94.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x29B94 11916 bytes
SHA-256: a07d7dbc9d86f757b00504f8da2b486126d60e0d15e8f205b04127148e1ba043
font_03_sfnt_off0002c2f4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x2C2F4 16308 bytes
SHA-256: 41cc9fdc7fced0b963ac975dfe2a8151320d5fc9edaeea894e7eb110d100af5d

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