Malicious PDF — malware analysis report

Static analysis result for SHA-256 893bb00bec0af798…

MALICIOUS

PDF

92.4 KB Created: 2021-07-22 20:18:08 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: e85f08bcab94e5247fc2f76d8544097b SHA-1: a9e3072662759f1de90d1c2d1f065819a19a86a8 SHA-256: 893bb00bec0af7986e2482304ee6629950029428f776b39255bfd863e8b418fc
164 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains embedded JavaScript and numerous external URIs pointing to compromised WordPress sites. These links are likely used to host phishing pages or further malicious payloads. The ClamAV detection and ML classifier strongly indicate malicious intent, specifically related to phishing.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9951

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.
  • Embedded JS stream low PDF_JS
    PDF references a /JS stream. Generic JavaScript is common in benign forms; specific dangerous APIs are scored by separate rules.
  • 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://saraelv.no/wp-content/plugins/formcraft/file-upload/server/content/files/160a94999a8afd---90515700009.pdf
    • https://whiteelephant.co.in/wp-content/plugins/super-forms/uploads/php/files/08ced79566f9c2ccf46f1ccd9193efcd/lipobubidobamo.pdf
    • http://indiebookoftheday.com/wp-content/plugins/formcraft/file-upload/server/content/files/160ab95087e45e---35205667503.pdf
    • http://architects-desk.com/uploadsfile/wefapekikoxu.pdf
    • https://c4ir.ae/wp-content/plugins/super-forms/uploads/php/files/qvjmfehlepcf7raccj59768sr0/3198856840.pdf
    • https://kassa-evotor.ru/wp-content/plugins/super-forms/uploads/php/files/forejf1jphlfbv5mrt0jdmmqoe/nikufafe.pdf
    • http://plovdivweek.com/app/templates/js/ckfinder/userfiles/files/13865751833.pdf
    • https://www.chinacimctrailer.com/wp-content/plugins/super-forms/uploads/php/files/dbef5861fadbfa215d6714f80f683b56/75324990674.pdf
    • https://webhostmurah.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607a97dd0a068---990051317.pdf
    • https://rocksoliddesigns.biz/userfiles/file/86612808042.pdf
    • http://evabody.ro/wp-content/plugins/formcraft/file-upload/server/content/files/160c45a870571f---48291075261.pdf
    • http://wooshin.kr/uploaded/file/173807527160a22dd672290.pdf
    • http://best-infosystems.com/userfiles/file/vufovibimes.pdf
    • https://ceccargiurgiu.ro/userfiles/file/fiwigonasemoxuwibilepugum.pdf
    • http://zimaletto.com/uploads/file/xunoxolukadotorosor.pdf
    • https://gonguyenkhoi.vn/upload/files/24481913111.pdf
    • https://fitnessrev.net/wp-content/plugins/super-forms/uploads/php/files/95vlha58rbd0qt1gauis362rdb/6915328243.pdf
    • http://ogbchurch.com/clients/880797/File/raxanozaligezixit.pdf
    • http://hncastlecable.com/d/files/98624975536.pdf
    • https://isosklo.cz./uploads/22046935584.pdf
    • http://juniorsmagazine.com/wp-content/plugins/formcraft/file-upload/server/content/files/16083c1f346ed2---59170614601.pdf
    • http://banghetretruc.com/media/ftp/file/16740075713.pdf
    • http://aimic.com/userfiles/file/98868786973.pdf
    • http://www.unidacardoso.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/160e03f4c2600e---57765291762.pdf
    • https://smartcirclegroup.com/userfiles/file/60842591019.pdf
    • https://aldea.work/wp-content/plugins/super-forms/uploads/php/files/7870d4918c0b30ac37bd033e63ca6152/57225695911.pdf
    • https://feedproxy.google.com/~r/skout/mBVl/~3/DOqCt-cVA4I/uplcv?utm_term=how+many+times+should+you+feed+your+goldfish+a+day
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/
    • http://dejavu.sourceforge.net
    • http://dejavu.sourceforge.net/wiki/index.php/License

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000101f5.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0x101F5 16792 bytes
font_01_sfnt_off00011a0c.bin
de4b99675780b645f82e307dd2be9f012e5d30405bded5c8792a36d32c16d911
pdf-font-stream PDF embedded font (sfnt) at offset 0x11A0C 11092 bytes
font_02_sfnt_off00013380.bin
14bf8e2e97adc5c409b804e95fd2874e9863bf8f163ff37606d693afe8816431
pdf-font-stream PDF embedded font (sfnt) at offset 0x13380 17732 bytes