Malicious PDF — malware analysis report

Static analysis result for SHA-256 7ba009d42778834a…

MALICIOUS

PDF

99.0 KB Created: 2021-07-20 07:07:50 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-16
MD5: 43cb84ec62f5c74d830eb5084a8b564d SHA-1: a2ae49fa163452b2ee9a868daad83c724b6226c8 SHA-256: 7ba009d42778834af52e0461cbd49f5e981580a73ccd8d0535b52dde43e5e9f2
196 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains numerous links to external websites, many of which are hosted on compromised CMS platforms or disposable domains, indicating a link farm for malicious purposes. The ML classifier and ClamAV detection strongly suggest malicious intent, likely related to phishing or malware distribution. Although no scripts were directly extracted, the PDF structure and URL patterns are indicative of an attempt to redirect users to malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9928

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 to algorithmically-generated URL high PDF_RANDOM_URL_LINK
    PDF contains a clickable HTTP(S) link whose host looks algorithmically generated (pronounceable-random labels) and whose path/query carries a long high-entropy token. This is the randomized-redirector pattern of malspam phishing lures — the visible document is only a prompt — not a PDF parser vulnerability.
  • 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://vasilii-orlov.fun/wp-content/plugins/super-forms/uploads/php/files/35f528c9cff79a6d88205a5d488ac314/41003469322.pdf In PDF document text
    • https://licorne-hotel-restaurant.com/userfiles/file/lawosekekexotuvu.pdfIn PDF document text
    • https://ailani.org/wp-content/plugins/super-forms/uploads/php/files/25a79e9ac1abea515b402e27b88f6a9b/12589727310.pdfIn PDF document text
    • http://akicgiyim.com/userfiles/file/vegafunuzatafekagir.pdfIn PDF document text
    • http://www.cargeacrew.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/1608be75a05b02---zimariliwaw.pdfIn PDF document text
    • http://architettoangeli.it/userfiles/files/93433824603.pdfIn PDF document text
    • https://jetzterstrecht.hamburg/wp-content/plugins/super-forms/uploads/php/files/8d0va3ov63l919qfa4ng2aqsri/68199296462.pdfIn PDF document text
    • http://seednseed.com/admin/fckfiles/file/mofurisujavixorubugerov.pdfIn PDF document text
    • http://www.tractortools.cz/ckfinder/userfiles/files/19495568482.pdfIn PDF document text
    • http://www.sunarnuricomuisvealisverismerkezi.com/wp-content/plugins/super-forms/uploads/php/files/7d74uhc7quoilij8ecfnb9q8j6/25421072271.pdfIn PDF document text
    • https://markzone.az/wp-content/plugins/super-forms/uploads/php/files/4c1r2m6idp4e6856reih7q31vd/64757657442.pdfIn PDF document text
    • http://fondationmonetoile.org/clients/0/0e/0ecfe6182781ff486fe5156d2e85c11d/File/46119183095.pdfIn PDF document text
    • https://trucraftsmanship.com/wp-content/plugins/formcraft/file-upload/server/content/files/160982b740f592---21741852687.pdfIn PDF document text
    • https://iamtimeshare.com/userfiles/file/biwunivomej.pdfIn PDF document text
    • http://www.predoisiasociatii.ro/wp-content/plugins/formcraft/file-upload/server/content/files/160a0b1e7a5c0f---xivorobuweru.pdfIn PDF document text
    • https://alllegaltask.com/wp-content/plugins/super-forms/uploads/php/files/00ranbi8ard0vagnr5kbn1534e/56060836506.pdfIn PDF document text
    • https://gk-termopanel.ru/wp-content/plugins/super-forms/uploads/php/files/0328ba72c17fa1dae91d53345c8bb5d4/lomexuxiwolaroxufoxonawit.pdfIn PDF document text
    • http://global-gypsum.com/wp-content/plugins/formcraft/file-upload/server/content/files/16086076425fb6---gumag.pdfIn PDF document text
    • http://hiroi-es.info/yamituki-n/uploads/files/pulojajawok.pdfIn PDF document text
    • http://bazis-expertiza.ru/ckfinder/core/connector/php/files/dugozebifonugelasijowuj.pdfIn PDF document text
    • https://endoaccessories.com/wp-content/plugins/super-forms/uploads/php/files/imo9i5vs2dt705bf296vafevpu/81580256521.pdfIn PDF document text
    • https://pointsourcegroup.com/wp-content/plugins/super-forms/uploads/php/files/b04015f5a6fde900eb692ff720d6408c/70353503286.pdfIn PDF document text
    • https://coachtourbusrental.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606ceccad92ba---jerimijukawagazalajanu.pdfIn PDF document text
    • https://ag-concept.ru/wp-content/plugins/super-forms/uploads/php/files/c840c6ffca149720ea146e6a6e499eaa/gafoderatolamodizowafaw.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/ngfLrbzwjls/uplcv?utm_term=how+do+you+address+in+care+of+on+an+envelopePDF 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_off00011d82.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11D82 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off00013594.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13594 17940 bytes
SHA-256: 9a6206a572dbce6075f1677c55327ffd261d6febc7cfe10caba6901fa3544f78
font_02_sfnt_off0001651a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1651A 10872 bytes
SHA-256: 08227b9c3c7e6c4b346c70a9426623eced6c3a166a9d87b53e001c438114fb44

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