Malicious PDF — malware analysis report

Static analysis result for SHA-256 cae4a9d7ff3698d8…

MALICIOUS

PDF

70.2 KB Created: 2021-09-30 22:33:03 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-27
MD5: 0cf0d8b5cea21adbf3fd3662ae5c02bf SHA-1: 3c994f1e3021dddbe6576498592c3fef8aec37fe SHA-256: cae4a9d7ff3698d8a7f92a8a723b86967ffe88541dffe0063fd9fa1433cdb05d
156 Risk Score

Malware Insights

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

The PDF contains numerous links to external websites, many of which are hosted on compromised CMS platforms or disposable domains, indicating a link farm designed to redirect users. The ClamAV detection and ML classifier strongly suggest malicious intent, likely phishing or malware distribution. Although no scripts were explicitly extracted, the PDF structure and embedded URLs are indicative of malicious activity.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9947

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://drafthe.ru/uplcv?utm_term=gta+5+mod+version+download+for+android PDF link annotation
    • https://anbuadidravidarmatrimony.com/ckfinder/userfiles/files/21543944450.pdfIn PDF document text
    • http://musthighschool.mn/ckfinder/userfiles/files/33934772186.pdfIn PDF document text
    • http://teplorium.su/userfiles/file/getotewateparugotunapam.pdfIn PDF document text
    • https://www.adelaarenergy.com/wp-content/plugins/super-forms/uploads/php/files/9m3pt8qjcjtub2fr9mjb8c8o08/81532607823.pdfIn PDF document text
    • http://navigator-nsk.ru/userfiles/file/77864354497.pdfIn PDF document text
    • http://studiolegalezullo.eu/userfiles/files/38509113235.pdfIn PDF document text
    • http://uptindia.com/newsimages/file///maxelakan.pdfIn PDF document text
    • https://foodvellythailand.com/upload/files/jijitubupajalo.pdfIn PDF document text
    • https://beyondpins.com/calisma2/files/uploads/visibowu.pdfIn PDF document text
    • http://www.cascinasorigherio.it/wp-content/plugins/formcraft/file-upload/server/content/files/161431451812de---zijimalizi.pdfIn PDF document text
    • http://studiosimonepantaleo.it/userfiles/files/39469071701.pdfIn PDF document text
    • http://chupanhnoithat.vn/upload/files/teriwevegaga.pdfIn PDF document text
    • http://droprint.my/home/ququ4923/public_html/userfiles/file/wowujuwowene.pdfIn PDF document text
    • https://styliststudios.com/imagesTE/file/32306749674.pdfIn PDF document text
    • https://rmp-familienanzeigen.de/cms/files/gegap.pdfIn PDF document text
    • http://atlantichomeportugal.com/wp-content/plugins/formcraft/file-upload/server/content/files/16149d7b42cf9e---zufojanidizadudezorobuja.pdfIn PDF document text
    • http://taxfreepoint.com/file/72084829555.pdfIn PDF document text
    • http://kovospm.cz/fotky/file/rajokutovek.pdfIn PDF document text
    • http://srilakshmienterprises.net/uploads/11863895909.pdfIn PDF document text
    • http://twozonechickenlasvegas.com/uploads/files/38834084792.pdfIn PDF document text
    • http://noticiascgnews.com.br/ckfinder/userfiles/files/mejinezonobusoguze.pdfIn PDF document text
    • http://khiensa.com/UserFiles/File/zegamovakurufakenarafata.pdfIn PDF document text
    • http://ediljolli.com/userfiles/files/luwatenonosit.pdfIn PDF document text
    • http://tw-sincere.com/upfiles/editor/files/fanakajesixibevojozep.pdfIn PDF document text
    • http://doanhnhangiaophanvinh.com/images/files/24348894851.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_off0000b005.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB005 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000c81c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC81C 10840 bytes
SHA-256: b43a8c9c54b1cdac9e73261cb7c4459257fc9e7949ae0aad2115128cb5e9aec0
font_02_sfnt_off0000e141.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE141 16440 bytes
SHA-256: 2b95b98f87b6a75d9e28b51f0fc46a8b9248bc13ab063a98f8aac546de934d68

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