Malicious PDF — malware analysis report

Static analysis result for SHA-256 4f7eca7c44e9e2d9…

MALICIOUS

PDF

82.0 KB Created: 2021-08-19 01:27:01 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-09-17
MD5: ba4a3e275271683777c202e7fd9ec22c SHA-1: 59b39e0a43586148c3ef6cb07f6034183f494665 SHA-256: 4f7eca7c44e9e2d9d753697f773905ec2dc4ad5c9964f5401998859ce5998e3d
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file was flagged by multiple heuristics and a machine learning classifier as malicious, with ClamAV identifying it as Pdf.Phishing.Trojan. The document contains a link farm pointing to compromised WordPress sites, suggesting an attempt to redirect users to malicious content. No scripts were extracted, but the presence of numerous external URLs indicates a likely phishing or malware distribution campaign.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9986

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://laborke.ru/uplcv?utm_term=why+would+low+beam+headlights+not+work PDF link annotation
    • https://tfnd.org/wp-content/plugins/super-forms/uploads/php/files/98fb108b367630efae79adff9363ca75/matijevofijoxejokuz.pdfIn PDF document text
    • https://www.certificagreen.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b7550ee98e4---14197162852.pdfIn PDF document text
    • https://steklo-shik.ru/userfiles/file/numoxabuzuxo.pdfIn PDF document text
    • http://cbcom.eu/ressource/site-image/files/95490584308.pdfIn PDF document text
    • https://insolite.lu/img/userfiles/files/13594022491.pdfIn PDF document text
    • http://primethailand.com/ckfinder/userfiles/files/96982610720.pdfIn PDF document text
    • https://sirikulsteel.com/wp-content/plugins/formcraft/file-upload/server/content/files/160975e7c653ba---fejarux.pdfIn PDF document text
    • http://www.reroofingbrisbaneqld.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/16072f2b8a1d5b---dedutijogejuwisoroki.pdfIn PDF document text
    • http://brodart01.com/wp-content/plugins/super-forms/uploads/php/files/ct25pjddmroc00314qhqbr7tfu/54537170657.pdfIn PDF document text
    • https://ivaco.it/file/fulumeparuloburorogijafom.pdfIn PDF document text
    • https://afra24.com/basefile/afra24/files/40184894166.pdfIn PDF document text
    • http://beamstraffic.ae/amb/userfiles/file/9214293224.pdfIn PDF document text
    • http://kidsjeodo.com/images/files/zegekexum.pdfIn PDF document text
    • http://brixtontaxi.com/survey/userfiles/files/95640676709.pdfIn PDF document text
    • http://www.airportlimofortlauderdale.net/wp-content/plugins/formcraft/file-upload/server/content/files/160c554ec6213c---leribizonepavuzesot.pdfIn PDF document text
    • http://apexhealthnutrition.com/newerac2c/userfiles/file/laxojane.pdfIn PDF document text
    • https://bestmiamiturf.com/wp-content/plugins/super-forms/uploads/php/files/80a4e48d1767754b450bcf552d6bfa55/15563213273.pdfIn PDF document text
    • https://vernadoc.com/wp-content/plugins/super-forms/uploads/php/files/a36c11ff2fe3bf4467c6e48176e1689f/kebuduzalakiji.pdfIn PDF document text
    • https://ceccargiurgiu.ro/userfiles/file/59659642597.pdfIn PDF document text
    • http://samromschool.com/UserFiles/file/66446130198.pdfIn PDF document text
    • https://www.fifatravels.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c4007356ba3---8956025915.pdfIn PDF document text
    • https://bizdrive.nl/wp-content/plugins/formcraft/file-upload/server/content/files/1/1607c0c05e3d44---rusinimopisiserodofapire.pdfIn PDF document text
    • https://glosunspa.com/wp-content/plugins/formcraft/file-upload/server/content/files/16085418fa4186---21671141928.pdfIn PDF document text
    • http://bannails.com/fckeditor_userfiles/file/52430346428.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

Related samples 8

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000dd09.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDD09 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000f51b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF51B 16312 bytes
SHA-256: 793da05b050447de044f0727bd2773a5bd706f659117f8db563f11ca594639b1
font_02_sfnt_off00011f3e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11F3E 11220 bytes
SHA-256: 80bec04e302c21fdff55cf6e3442c92310dda783fd05eec5b338d31d7c8848e6

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