Malicious PDF — malware analysis report

Static analysis result for SHA-256 fa75b9f74dc99bd6…

MALICIOUS

PDF

79.4 KB Created: 2021-06-19 06:53:00 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-27
MD5: bbf82ad34828cc8d45c549d3c96e771f SHA-1: d9149081370eda5636c5d49528429669eeebe7fd SHA-256: fa75b9f74dc99bd6e4427ad54df75e1fa367171e8ecd2a6b7dd293669e0c88f6
164 Risk Score

Malware Insights

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

The PDF contains multiple heuristics indicating it is a link farm pointing to compromised websites, likely to trick users into downloading malicious content. The ML classifier and ClamAV detection strongly suggest malicious intent, classifying it as a phishing trojan. The presence of a 'download button' lure further supports the phishing attack pattern.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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.
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • 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://pansophers.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a3bfc8907c7---90487671585.pdf In PDF document text
    • http://sashtraayurveda.com/ckfinder/userfiles/files/nurenidoxibiwirevujoziji.pdfIn PDF document text
    • http://exactblue.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a21c5c2dfb6---melemogujixizux.pdfIn PDF document text
    • http://elmiraclassiccountry.com/wp-content/plugins/super-forms/uploads/php/files/opdr9j7vdpefc3uecvkrvaroi1/28817871005.pdfIn PDF document text
    • https://vakukh.ru/wp-content/plugins/super-forms/uploads/php/files/d6936846057a6da8bd66d00c1f369882/23719568635.pdfIn PDF document text
    • https://singaporeroadshow.com/wp-content/plugins/super-forms/uploads/php/files/a5b1dc211474b291c37cd3c53bc6f204/88489474407.pdfIn PDF document text
    • https://www.grecosalesinternational.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606f5d6b49c9b---12643969901.pdfIn PDF document text
    • http://www.firengo.com/userfiles/files/37258788285.pdfIn PDF document text
    • https://aashianarealty.com/file/fevizemevepajozilimuxuz.pdfIn PDF document text
    • https://karinbentum.nl/uploads/file/96786020938.pdfIn PDF document text
    • http://olympusflights.com/files/files/94519872085.pdfIn PDF document text
    • https://prosegik.com/wp-content/plugins/super-forms/uploads/php/files/c7127faa45512922973928f20ed78c68/waxabovogimoto.pdfIn PDF document text
    • https://iamluno.com/wp-content/plugins/formcraft/file-upload/server/content/files/16077a82034c97---24690261896.pdfIn PDF document text
    • https://samarpanbharat.org/trila/userfiles/file/tubafatoruxozixivexalij.pdfIn PDF document text
    • https://driftwoodcc.com/userfiles/files/32234869418.pdfIn PDF document text
    • https://www.pal-kont.hu/wp-content/plugins/super-forms/uploads/php/files/5992c71ff19b070ddea800ffe0f11b21/gatawuzudamoraxewon.pdfIn PDF document text
    • http://amfmeg.org/wp-content/plugins/formcraft/file-upload/server/content/files/160844ba2960cd---96990211496.pdfIn PDF document text
    • https://www.hintonassociates.com/wp-content/plugins/super-forms/uploads/php/files/a1067a024fda7412c539b35ec89c4785/98833273373.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/3CAf4wW3hvY/uplcv?utm_term=no+problem+full+movie+downloadPDF 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://scripts.sil.org/OFLIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000ec68.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEC68 5072 bytes
SHA-256: 275bbd447d36933c66259d14ca54a341bfaeca1b9096c3b6cb84f3734324c0e1
font_01_sfnt_off0000fd96.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFD96 10856 bytes
SHA-256: 745750c4cf4931cb35d3be3aa2d185788cc1e12c0da58a3a14a7c5081c50bfb7
font_02_sfnt_off00012242.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12242 4324 bytes
SHA-256: 1062cd8ddf90f4344fa193b395386d5669df1a952e5759311ca261a71931f361

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