Malicious PDF — malware analysis report

Static analysis result for SHA-256 b7bc2aa356aa3d70…

MALICIOUS

PDF

74.4 KB Created: 2021-09-06 05:46:47 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-11
MD5: c7fc40e44157d29682356195d672c5e6 SHA-1: cc076918e625d4ec4843a3335fb819451b1faeeb SHA-256: b7bc2aa356aa3d7075c5932652d6c10473c4eb480eadb7d6c2f869909f3cb5d2
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file was flagged by a machine learning classifier and ClamAV as malicious, indicating a high likelihood of malicious intent. The heuristics reveal it functions as a link farm, directing users to numerous external URLs hosted on compromised or disposable domains, likely for phishing or malware distribution. While no scripts were explicitly extracted, the PDF structure and embedded URLs suggest it's designed to redirect users to malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9980

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://laborke.ru/uplcv?utm_term=trilogy+creation+of+the+universe+pdf PDF link annotation
    • https://lensprovn.com/ckfinder/userfiles/files/sofulojuxazixiboxat.pdfIn PDF document text
    • https://byocamacho.com/ckfinder/userfiles/files/kukolixafajope.pdfIn PDF document text
    • https://moveo-sport.pl/userfiles/file/zigulorikewobopipikiw.pdfIn PDF document text
    • https://adm.allianceflooring.net/wp-content/plugins/super-forms/uploads/php/files/28e290926f8ddf8611ef0b199577aa97/95494536376.pdfIn PDF document text
    • http://escolacaritas.com/wp-content/plugins/formcraft/file-upload/server/content/files/160ac2962b69ae---zasavuvelupaxolomelixido.pdfIn PDF document text
    • http://elyriahigh1974.org/clients/0/05/052ab20d644b737728595af1a47b4450/File/fitazutumu.pdfIn PDF document text
    • http://sinara.org.br/wp-content/plugins/formcraft/file-upload/server/content/files/1608f6b270ef5e---jenujawusibofusebuvogadub.pdfIn PDF document text
    • https://earthideasawnings.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608625cb600ff---pazanuxem.pdfIn PDF document text
    • https://tepihtrava.rs//files/96975889530.pdfIn PDF document text
    • https://ytdrive.com/CKEdit/upload/files/xaboxijiviferinuvojurafim.pdfIn PDF document text
    • https://www.libyamonitor.com/sites/all/libraries/ckfinder/userfiles/files/32401807495.pdfIn PDF document text
    • https://www.ciabrini-immobilier.com/wp-content/plugins/super-forms/uploads/php/files/0ebr85h5n4d9dpupur3b8b8a84/nojelunibukasuva.pdfIn PDF document text
    • http://veronicanealhome.com/wp-content/plugins/formcraft/file-upload/server/content/files/2/1607ed85de7b22---19038160669.pdfIn PDF document text
    • https://073741256.com/uploads/files/202108230817071078.pdfIn PDF document text
    • http://zabbeleecooking.com/ckfinder/userfiles/files/22087753540.pdfIn PDF document text
    • http://amfmeg.org/wp-content/plugins/formcraft/file-upload/server/content/files/1607a1ee446ac0---durutavaretopujowekejuta.pdfIn PDF document text
    • http://casaperugia.fr/userfiles/file/16778218218.pdfIn PDF document text
    • https://storage-in-motion.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c3f7200fdea---mifipulunoben.pdfIn PDF document text
    • http://multifamilyfoundation.org/clients/3/38/38c33163524538bb895552046de0b362/File/winexovunadetixukan.pdfIn PDF document text
    • http://adanateknikservis.web.tr/wp-content/plugins/formcraft/file-upload/server/content/files/161290e2e28966---mawasijaviwabal.pdfIn PDF document text
    • https://remoteyourstaff.com/calisma2/files/uploads/watukidaludikenapeselob.pdfIn PDF document text
    • http://galeriejacqueselbaz.com/userfiles/file/59313603828.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_off0000be60.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xBE60 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000d672.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD672 17156 bytes
SHA-256: 8281776154a51c41cc3fc07aa10b9961d253ac9114a2649163b810cb303f9edd
font_02_sfnt_off0001026a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1026A 11140 bytes
SHA-256: 534d044c95b8b663e1d336eb0d37acc41f73e6f5206b8fe87885065697762534

Open this report in the interactive analyzer, or submit your own file for analysis.