Malicious PDF — malware analysis report

Static analysis result for SHA-256 8e6da73a853e312b…

MALICIOUS

PDF

86.9 KB Created: 2021-08-26 14:09:42 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-07
MD5: 3abda2692d87a59f74ee3b3876d97561 SHA-1: dc96a73470d6d5c0d95987d221fcc1f212b0cbd7 SHA-256: 8e6da73a853e312b3aa95a348aa0017a8b13f0a2b1f92617f35a7d6529922102
164 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

The PDF was flagged by multiple heuristics, including a ML classifier and ClamAV, indicating malicious intent. It contains a link farm pointing to compromised WordPress upload storage and other disposable hosting sites, suggesting a phishing or malware distribution scheme. The document body was unreadable, but the presence of numerous links to potentially compromised domains strongly suggests a malicious purpose.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9956

Heuristics 7

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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.
  • Urgency / deadline lure low SE_URGENCY_LURE
    Document contains urgency or deadline language ('account will be terminated', 'action required within 24 hours', etc.) — useful context, but low-signal without other findings
  • 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 http://firegallery.ru/img/upload/kivujafegimusezas.pdf In PDF document text
    • https://mosconi.net/userfiles/file/77954085820.pdfIn PDF document text
    • http://salamino.pl/userfiles/file/puvewuvitojatowogerir.pdfIn PDF document text
    • https://ikima.fr/uploads/file/22084607577.pdfIn PDF document text
    • http://khochailo.com/upload/ck/files/4285134656.pdfIn PDF document text
    • http://doudou.tw/userfiles/files/57585335274.pdfIn PDF document text
    • https://www.hintonassociates.com/wp-content/plugins/super-forms/uploads/php/files/95306eedfeafea0a6fd3149f281790a8/83539229437.pdfIn PDF document text
    • http://goksirkrupskimlyn.pl/img/upload/files/70405030530.pdfIn PDF document text
    • https://pyhm.ca/wp-content/plugins/super-forms/uploads/php/files/6qtnc3urr2dfkv95focfvmnklp/53226166830.pdfIn PDF document text
    • http://shethof.ch/cgi-bin/dynamisch/file/71778759717.pdfIn PDF document text
    • http://sts-logistika.ru/wp-content/plugins/super-forms/uploads/php/files/9872c0017b7b9a402871bb0ef63df6ca/fuwezibukawar.pdfIn PDF document text
    • https://cedarcreeksauce.com/wp-content/plugins/super-forms/uploads/php/files/fce75a76915af890756a74676d82f85f/nomevuwigogiwoni.pdfIn PDF document text
    • https://maspacientes.es/wp-content/plugins/super-forms/uploads/php/files/1qauskic9q1ndarokongvp2q9c/gasinixawadixomo.pdfIn PDF document text
    • http://www.caribbeandentist.com/wp-content/plugins/formcraft/file-upload/server/content/files/160848009e35f6---80137406066.pdfIn PDF document text
    • https://wcdt.co.th/wp-content/plugins/super-forms/uploads/php/files/edrkllfmg9t2mcipns1chllfij/ponibafunumom.pdfIn PDF document text
    • https://www.booster-p.com/wp-content/plugins/formcraft/file-upload/server/content/files/16083dd23801ec---62405286869.pdfIn PDF document text
    • https://stmarys-perthamboy.com/upload/File/jofojakumi.pdfIn PDF document text
    • https://monacollection.ua/wp-content/plugins/super-forms/uploads/php/files/e9a62687575bd3d25aa133a09ca9c44e/guwusimovagi.pdfIn PDF document text
    • https://prikolnaya.com/wp-content/plugins/super-forms/uploads/php/files/4b0d21d0377eccc909c0c34965336dd3/98791530432.pdfIn PDF document text
    • http://7166867.ru/ckfinder/userfiles/files/13767488695.pdfIn PDF document text
    • https://www.truesdalepainting.com/wp-content/plugins/formcraft/file-upload/server/content/files/16097fdfe4125f---xuguwuremaxid.pdfIn PDF document text
    • http://nexxosrealty.com/userfiles/files/gokifakebovipukededa.pdfIn PDF document text
    • http://bularz-auto.pl/images/userfiles/file/vedogazubadam.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/DOqCt-cVA4I/uplcv?utm_term=my+whole+back+achesPDF 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://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000d8a0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD8A0 10360 bytes
SHA-256: 4889819c82584d1bd14ff56a89d6330e9af3e62e5252fa217153ebc99953d4af
font_01_sfnt_off0000f04c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF04C 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off0001085d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1085D 17224 bytes
SHA-256: 56e3e7a59b6b81b942ac5773fe86c4e84e3f9bd93551a407574118239931a9ed
font_03_sfnt_off000121e0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x121E0 16380 bytes
SHA-256: 9393d24debe5988dd0a630fc97fe1f034f023bbc95029b35cfecf497356817e5

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