Malicious PDF — malware analysis report

Static analysis result for SHA-256 4abcbf6f02c52941…

MALICIOUS

PDF

78.0 KB Created: 2021-09-05 14:10:31 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-07
MD5: b181689cbbd4378e174e282f0ae44f3b SHA-1: c325938473d04b3107a337476fab30d8a11bae7b SHA-256: 4abcbf6f02c529413d3911619230c8603a64fb8df585df2da2f557caaa48fde9
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

The file is identified as a malicious PDF by multiple heuristics and an ML classifier, with ClamAV detecting it as Pdf.Phishing.Trojan. The numerous extracted URLs, many pointing to compromised CMS uploads or disposable hosting, indicate a link farm designed to redirect users to potentially malicious content. The PDF's structure and content suggest it is part of a phishing or scam campaign.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9963

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://irlanc.ru/uplcv?utm_term=2007+chrysler+town+and+country+minivan+owners+manual PDF link annotation
    • https://svltv.in/userfiles/files/47675013826.pdfIn PDF document text
    • http://adhdadvisory.com/wp-content/plugins/formcraft/file-upload/server/content/files/16078b79622091---pizefitevixowoze.pdfIn PDF document text
    • https://momsgardenfoods.com/ckfinder/userfiles/files/34519396506.pdfIn PDF document text
    • https://sheenabusesandcoaches.com/userfiles/file/medigoninabav.pdfIn PDF document text
    • https://vidaleve.ind.br/ckfinder/userfiles/files/94648461437.pdfIn PDF document text
    • http://sam-global.ch/files/file/janolafuz.pdfIn PDF document text
    • https://blueridgelightingandcontrols.com/wp-content/plugins/super-forms/uploads/php/files/d5439f11cecfe8dbb1a9b1d976d449af/nosapaguvetevijunolo.pdfIn PDF document text
    • http://reklama-kemerovo.ru/files/files/kadolamamap.pdfIn PDF document text
    • http://ap116.ru/userfiles/file/zuwuped.pdfIn PDF document text
    • https://arizonapoolcontractor.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607eac5c16ddd---16572851880.pdfIn PDF document text
    • https://www.unicodesystems.com/wp-content/plugins/super-forms/uploads/php/files/7sddb4ca2bjf9876hpahmhkdd4/viparonogemisad.pdfIn PDF document text
    • https://bnbtravels.com/ckfinder/userfiles/files/jusiwabamodava.pdfIn PDF document text
    • https://seger.cz/userfiles/file/20512522748.pdfIn PDF document text
    • http://webinaris.blog/ckfinder/userfiles/publics/files/xokelirorimogurubokej.pdfIn PDF document text
    • http://erpsamik.com/ckfinder/userfiles/files/vaxemakufaj.pdfIn PDF document text
    • https://oneremote.ru/wp-content/plugins/super-forms/uploads/php/files/e35df06a5cd5914c7844c2216bcbcf11/bunugaxitoz.pdfIn PDF document text
    • http://tfh-filter.hu/_user/file/jewijofanowawone.pdfIn PDF document text
    • http://prodesign31.ru/wp-content/plugins/formcraft/file-upload/server/content/files/160744925072b0---wegizemofirujosin.pdfIn PDF document text
    • http://deficanderel.com/clients/6/67/674a09facce11b7629d390eef9534ff9/File/19219382927.pdfIn PDF document text
    • http://bubblesoflove.net/wp-content/plugins/formcraft/file-upload/server/content/files/160855c6a95fee---ziridit.pdfIn PDF document text
    • http://ck-buhgalter.ru/userfiles/file/75615103472.pdfIn PDF document text
    • http://s292376414.onlinehome.fr/datas/imgmail/file/81210937806.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://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000c8a1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC8A1 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000e0b3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE0B3 17460 bytes
SHA-256: 1eb253fc2cc4ac413fc933ed0f16962e20c8205f90434ea8a34dbcc872cf9df9
font_02_sfnt_off00010e1d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10E1D 11196 bytes
SHA-256: 2a834ed6a4187d5c8ddaae0dba5e1bbe87b89deee50d1c899e3b79d00bdc0c1d

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