Malicious PDF — malware analysis report

Static analysis result for SHA-256 f2795faa1ee0d1f8…

MALICIOUS

PDF

68.0 KB Created: 2021-09-24 16:45:30 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-11-23
MD5: f281250ed8140891100c3fdb49f91992 SHA-1: c2b4f634591005c89f29d0dd42040c52a55f59b7 SHA-256: f2795faa1ee0d1f8a1276449ce10aa687c4ba211969b79e29e848e80dda1e9b8
176 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF employs an image-based lure, a common tactic for phishing or malware delivery. It contains numerous links pointing to potentially compromised websites, suggesting an attempt to redirect users to malicious content or download further payloads. The ClamAV detection and ML classifier strongly indicate malicious intent.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9957

Heuristics 7

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • Image-only document with action trigger (screenshot lure) medium PDF_IMAGE_LURE
    PDF has 1 image(s), only 2 text block(s), carries a click-outward action, and is only 67 KB — typical shape of a phishing lure where a full-page screenshot hides a clickable button that launches or submits to an attacker URL.
  • 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://archism.ru/uplcv?utm_term=kahaani+2+full+movie+hd+1080p PDF link annotation
    • https://saraelv.no/wp-content/plugins/formcraft/file-upload/server/content/files/16143704327bcb---33365978193.pdfIn PDF document text
    • http://baharemadinah.com/wp-content/plugins/formcraft/file-upload/server/content/files/1613e169c692d4---92377563066.pdfIn PDF document text
    • https://bakotech.at/uploads/ckeditor/files/janemurasobu.pdfIn PDF document text
    • http://iphysiology.ru/upload/86398051507.pdfIn PDF document text
    • http://originalbau.hu/imagesfiles/14052469049.pdfIn PDF document text
    • http://lumieye.com/userData/ebizro_board/file/73396122555.pdfIn PDF document text
    • https://alixdemassy.fr/userfiles/file/31994616709.pdfIn PDF document text
    • http://arcadia-fitness.es/userfiles/file/xofotugivego.pdfIn PDF document text
    • http://eszixv.hu/ckfinder/userfiles/files/zezagerozimuloxemeb.pdfIn PDF document text
    • http://neo-net.info/giganet/files/file/72557063926.pdfIn PDF document text
    • http://teleserviciomalaga.com/ckfinder/userfiles/files/38636632087.pdfIn PDF document text
    • https://extremedriveline.com/ckfinder/userfiles/files/48921660921.pdfIn PDF document text
    • http://kerama.altrodesign.eu/ckfinder/userfiles/files/23027537471.pdfIn PDF document text
    • https://akilanews.com/ckfinder/userfiles/files/4810464412.pdfIn PDF document text
    • http://speaklifeiamgreatness.com/files/files/pokemabanuvavubonibaton.pdfIn PDF document text
    • https://cafemocion.com/userfiles/file/62727649932.pdfIn PDF document text
    • https://rosebankprimary.co.za/inc/ckfinder/userfiles/files/juwoweditulomipokafamogab.pdfIn PDF document text
    • http://innobiztour.com/FileData/ckfinder/files/20210914_1B105155B8F3179A.pdfIn PDF document text
    • https://mcq-exambd.com/app/webroot/ckfinder/userfiles/files/44648120260.pdfIn PDF document text
    • http://chupanhnoithat.vn/upload/files/miberejisitowi.pdfIn PDF document text
    • https://crownprolaw.cn/userfiles/Proj_Name/files/51135369440.pdfIn PDF document text
    • https://www.urban-quartz.co.uk/wp-content/plugins/super-forms/uploads/php/files/6057da7f4b12bf65184caa83a4357c43/nivevefunativij.pdfIn PDF document text
    • https://www.casestilistas.es/ckfinder/userfiles/files/kiwafitimolubewixewiwir.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_off0000ad46.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xAD46 14348 bytes
SHA-256: b9075ae42bc6220ccb36b8e98be150801543d307ed3cdd8a189ad47e68b9bbbd
font_01_sfnt_off0000d0cf.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD0CF 11056 bytes
SHA-256: 85f8ca31007a8e8eedcae3c6db4fd7d5d51c3656bad64b0099c403a659ccdca5
font_02_sfnt_off0000ea5e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEA5E 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1