Malicious PDF — malware analysis report

Static analysis result for SHA-256 702602f85436e5b8…

MALICIOUS

PDF

88.2 KB Created: 2021-08-01 11:18:42 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-26
MD5: b8bb2cb56650741068a303856b830f6c SHA-1: 5dafa7ab7ba1c21d0fa2ad8f2ea386f645e1afee SHA-256: 702602f85436e5b84bb816df2ab33c8a97f8811f572f75ff8d2218a07c44614e
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains numerous links pointing to various websites, many of which are hosted on compromised CMS platforms or appear to be part of a link farm. The ML classifier and ClamAV detection strongly indicate malicious intent, likely related to phishing or malware distribution. While no scripts were explicitly extracted, the PDF structure and embedded URIs suggest an attempt to redirect users to malicious content, potentially leveraging embedded JavaScript for execution.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9973

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 http://flygarfield.net/userfiles/file/zegadamizuribipufifete.pdf In PDF document text
    • http://apartmaji-zunicmile.com/uporabnik/file/pokenosifaporubuvewob.pdfIn PDF document text
    • https://brokenspoke.com/wp-content/plugins/super-forms/uploads/php/files/a10acf73ded6887c4a86826502ebaa41/78592015833.pdfIn PDF document text
    • http://casavacanzesanvito.eu/userfiles/files/92762684862.pdfIn PDF document text
    • http://gld-lining.com/user_img/files/99037315107.pdfIn PDF document text
    • https://mfdesign.hu/files/file/tidifaxujep.pdfIn PDF document text
    • https://rescue.bg/wp-content/plugins/formcraft/file-upload/server/content/files/160a353a259c2f---letaxipete.pdfIn PDF document text
    • http://travelport.pl/userfiles//file/mufabesaworozodapekazura.pdfIn PDF document text
    • https://amerismithenterprises.com/wp-content/plugins/super-forms/uploads/php/files/e14065def220f2e39c666151965c7b3b/lawekawu.pdfIn PDF document text
    • https://shiokuda2.com/contents//files/suresabapamufewamod.pdfIn PDF document text
    • https://canadianrelocation.net/wp-content/plugins/formcraft/file-upload/server/content/files/1607a6054458f4---92175801311.pdfIn PDF document text
    • http://acmemask.com/upfiles/editor/files/7856903771.pdfIn PDF document text
    • http://tajeer.co/userfiles/file/12320766647.pdfIn PDF document text
    • https://bringem.de/wp-content/plugins/super-forms/uploads/php/files/87a8f3497bb02429b70473cabfd175dd/79318328615.pdfIn PDF document text
    • https://fiberglasssupplydepot.com/userfiles/file/49910488128.pdfIn PDF document text
    • https://j-kowalewski.pl/uploads/userfiles/files/toroxepuzot.pdfIn PDF document text
    • http://heryeryesil.com/resimlerfiles/vewasu.pdfIn PDF document text
    • https://www.femregenx.co.za/wp-content/plugins/super-forms/uploads/php/files/4q3o4dnqdk7jvtq1epql616ag2/40028427729.pdfIn PDF document text
    • http://pericosrentcar.com.mx/wp-content/plugins/formcraft/file-upload/server/content/files/1608c8fdb72f1e---pakibekatetuvelivofinaz.pdfIn PDF document text
    • https://riverasphotovideo.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607c73b76558a---16032984503.pdfIn PDF document text
    • http://www.ferm-matic.fr/upload/file/pikofa.pdfIn PDF document text
    • https://www.masismarketing.com/wp-content/plugins/super-forms/uploads/php/files/0367982a930a2d6b3b2da3d5294dda06/nuwuvafutevoz.pdfIn PDF document text
    • http://kodemari.info/data/files/46003130032.pdfIn PDF document text
    • https://event-connections.net/wp-content/plugins/formcraft/file-upload/server/content/files/16079fdfc8bd98---52571830019.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/S30rS-6n6vg/uplcv?utm_term=vce+exam+simulator+pro+2.7+crackPDF 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://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_off0000f6dd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF6DD 16524 bytes
SHA-256: b925c39ab4cd95f6fd40332f494e079bdcb7d51ec107764a85aa452e7333e42f
font_01_sfnt_off000121ad.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x121AD 10932 bytes
SHA-256: e2d5ed93b01b9c22622787b59d97909fd970764ac837f1b8b561bee9c1cde9e7
font_02_sfnt_off00013b35.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13B35 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1