Malicious PDF — malware analysis report

Static analysis result for SHA-256 0faafecd7dcd3476…

MALICIOUS

PDF

79.9 KB Created: 2021-09-08 04:00:51 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-05
MD5: a6944417bfc6def818f5c55349aef723 SHA-1: c92fd2aeef1ad0608b6085514ef54c59a7d2f3f7 SHA-256: 0faafecd7dcd3476e2103b5a26a4b289649c9e31f526029e4bd3eb5be681cb7c
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. The file contains numerous embedded URLs, many of which point to compromised WordPress uploads or disposable hosting, suggesting a phishing or credential harvesting campaign. The presence of these links aligns with the 'Spearphishing Attachment' technique, as the PDF likely serves as a lure to direct users to malicious sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9956

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://catamma.ru/uplcv?utm_term=benim+hocam+tarih+konu+anlat%C4%B1m%C4%B1+2017+pdf PDF link annotation
    • https://my-natural-style.net/upload/files/suwan.pdfIn PDF document text
    • https://canadiancontractorservices.com/wp-content/plugins/super-forms/uploads/php/files/a1l4ans14oouu68dshg989rjm0/26501066855.pdfIn PDF document text
    • http://seoulsquare.com/userfiles/file/nirogifud.pdfIn PDF document text
    • http://wowbond.com/upload/Fckeditor/file/bagud.pdfIn PDF document text
    • http://designbeginnings.com/upload/file/pomowirafasimozed.pdfIn PDF document text
    • http://www.deadclan.nl/wp-content/plugins/formcraft/file-upload/server/content/files/160790832546d9---sibadidenitasofenajap.pdfIn PDF document text
    • https://sharzh-ufa.ru/wp-content/plugins/super-forms/uploads/php/files/6abe7fbc1cf8086031a2abd7e063d7c0/gafuxawupisawawekelumok.pdfIn PDF document text
    • https://canvasations.com/wp-content/plugins/super-forms/uploads/php/files/1931aaf154dfcf2c890b9f028184ad93/fudulurik.pdfIn PDF document text
    • http://katachizu.com/img/news/files/gezanuzarukuzudojoxuzove.pdfIn PDF document text
    • http://a9188.com/upload_files/art_files/files/20210625_234034.pdfIn PDF document text
    • http://kashima.cc/userfiles/file/87587440213.pdfIn PDF document text
    • http://paitoonbox.com/userfiles/files/vusuxuput.pdfIn PDF document text
    • http://www.empresasdelimpeza.info/wp-content/plugins/formcraft/file-upload/server/content/files/16094762c0bcaa---gokagomisipe.pdfIn PDF document text
    • http://sinners-party.de/media/file/32098393153.pdfIn PDF document text
    • http://exantusfamilyreunion.com/clients/9/96/968554593547eb574606130639276270/File/72643978243.pdfIn PDF document text
    • http://metalltechnik-kutschi.at/nenenuji.pdfIn PDF document text
    • http://keletunderground.hu/images/uploaded_pics/file/62662967422.pdfIn PDF document text
    • http://adhdesign.de/userContent/files/20210805123814-josafuz.pdfIn PDF document text
    • http://www.skupp.pl/wp-content/plugins/formcraft/file-upload/server/content/files/1608854deb2ebb---96019335510.pdfIn PDF document text
    • http://www.s4b.nl/upload/files/zogixivozadaxibipav.pdfIn PDF document text
    • http://reelproductionshd.com/userfiles/file/jiwubirifisejujimi.pdfIn PDF document text
    • http://karmand24.ir/basefile/ehotel724ir/files/27088289124.pdfIn PDF document text
    • https://jodhpurtravels.com/nbloom/fckuploads/file/subevevokipadosos.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_off0000cfb6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCFB6 18420 bytes
SHA-256: 06d991e4dce3fcf46234df1730d4ad9570593fab43ae3c8b6086dcb2be9de74e
font_01_sfnt_off0000fd02.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFD02 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off00011519.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11519 11352 bytes
SHA-256: 66da04d55818f809be19831d47b05328ef71300f6450d5e18062ab18773f757e

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