Malicious PDF — malware analysis report

Static analysis result for SHA-256 d44f7e40ef182e55…

MALICIOUS

PDF

79.3 KB Created: 2021-09-06 16:46:22 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-07
MD5: decd84a12bae337c78d48d1b1afeb6ca SHA-1: 6ae245cd4b1483aca55a74377655b12d5db44e99 SHA-256: d44f7e40ef182e55991a0214b5cd6151fc7446d3fc81669317d9a1fa482a791f
156 Risk Score

Malware Insights

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

This PDF file was flagged by multiple heuristics as malicious, including a high-confidence ML classifier and ClamAV detection. It contains numerous external URIs and link farm patterns, suggesting it's designed to redirect users to compromised websites or phishing pages. The presence of external URIs and link farm characteristics indicates a likely attempt to manipulate search engine results or distribute malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9958

Heuristics 6

  • 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.
  • 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://garglob.ru/uplcv?utm_term=moving+iron+power+factor+meter+pdf PDF link annotation
    • https://www.energetisch-therapeut-estie.nl/wp-content/plugins/formcraft/file-upload/server/content/files/1607ffbdc7b43b---89018806413.pdfIn PDF document text
    • http://strojsteel.cz/webpagebuilder/ckfinder/userfiles/files/biripa.pdfIn PDF document text
    • http://atdawnwelift.com/userfiles/file/36167562917.pdfIn PDF document text
    • http://kondicionery-ivanteevka.ru/upload_picture/file/gogix.pdfIn PDF document text
    • https://prosegik.com/wp-content/plugins/super-forms/uploads/php/files/dbe9070be56fbf58e67a80fbdbb474da/difilirowefutigufoluzazaj.pdfIn PDF document text
    • http://arisutour.com/ckupload/files/negipagedujutawipejetirin.pdfIn PDF document text
    • http://www.marsagri.com/wp-content/plugins/formcraft/file-upload/server/content/files/16086d7dbbff5f---34832527191.pdfIn PDF document text
    • http://english-life.ru/wp-content/plugins/formcraft/file-upload/server/content/files/1606d33a7e4fab---tewudizikufijadaxu.pdfIn PDF document text
    • https://adlinefor.com/home/webagen/public_html/korn/data/file/kimomoxolapademibugup.pdfIn PDF document text
    • https://getlovebooks.com/wp-content/plugins/super-forms/uploads/php/files/2fd30cc5ff82741ea665ba4cd8012283/vegevigiwifafetazege.pdfIn PDF document text
    • http://sun-green.nl/ckfinder/userfiles/files/gapoxogilow.pdfIn PDF document text
    • https://himalayanwanderer.com/himalayan/userfiles/files/soniguwikoduvozuwu.pdfIn PDF document text
    • https://space1500.com/wp-content/plugins/super-forms/uploads/php/files/cf0715b7d7124a5f7a33cd6b5de25c40/42055983179.pdfIn PDF document text
    • https://petek.biz/resimler/files/repaxagudalijifa.pdfIn PDF document text
    • https://makenie.com/upload/files/73688786741.pdfIn PDF document text
    • http://loadcell.vn/Images_upload/files/lizagiwuz.pdfIn PDF document text
    • http://ottotech.center/userfiles/file/kopilowokixotin.pdfIn PDF document text
    • http://nissanotogovap.net/uploads/images/files/nixigumilugigiwag.pdfIn PDF document text
    • https://huaienclinic.com/uploadpic/files/kemut.pdfIn PDF document text
    • https://www.caesarstravel.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607e12979a47a---kujoditowuzomege.pdfIn PDF document text
    • https://purpleleafestatebuyers.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609b01ac5b9be---bunipa.pdfIn PDF document text
    • http://9275522-travel.com/userfiles/file/javebagokilejir.pdfIn PDF document text
    • https://searchlink.org/userfiles/file/gokigonewatimexonevar.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_off0000d348.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD348 16904 bytes
SHA-256: 7a2468b246fec7e35652175e4d5e7fce3595debff53d5d41bb5a1a44eeb09494
font_01_sfnt_off0000feb3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFEB3 10896 bytes
SHA-256: 86d98d224462138bbafc23821dae7e5c5f604c3da968f56509a488ca467c078a
font_02_sfnt_off000117ce.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x117CE 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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