Malicious PDF — malware analysis report

Static analysis result for SHA-256 b98c2ef481b291af…

MALICIOUS

PDF

85.2 KB Created: 2021-09-02 21:51:03 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-27
MD5: 41e5aae87c55242deeb7c9e56f30a0ae SHA-1: 0fc5fd02957167619b953e895aa9c7e141926bce SHA-256: b98c2ef481b291af3ee7b50d3fdc012ac9f16818d710fd8a3b42dd22e3d45556
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

This PDF file was flagged by a machine learning classifier and ClamAV as malicious, specifically as a phishing trojan. It contains numerous links to compromised WordPress sites and disposable hosting, suggesting an attempt to redirect users to malicious content. The presence of external URIs and link farms indicates a likely phishing or malware distribution scheme.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9980

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://drafthe.ru/uplcv?utm_term=tesla+model+3+manual+or+automatic PDF link annotation
    • https://camping-du-lac-dijon.com/fichiers/14291600030.pdfIn PDF document text
    • https://tocgia247.com/wp-content/plugins/super-forms/uploads/php/files/3fbuvo400rdtuc0rdsfm0hrhgg/zuselowuzago.pdfIn PDF document text
    • http://www.kotolantopeni.cz/files/zavotavu.pdfIn PDF document text
    • http://shmgec.com/Uploadfiles/files/zavonexukezujupubidumirod.pdfIn PDF document text
    • https://kfz-gutachter-oliver-schiller.de/wp-content/plugins/formcraft/file-upload/server/content/files/160d773416ac02---vozamifubuzululo.pdfIn PDF document text
    • http://fashioneducation.ru/userfiles/file/85128803067.pdfIn PDF document text
    • https://www.tessilgiada.it/wp-content/plugins/formcraft/file-upload/server/content/files/16079a28f53521---rurinitajajegasuwujuwujiw.pdfIn PDF document text
    • http://anhbanglaw.com/userfiles/file/pujipokajirazim.pdfIn PDF document text
    • http://cnex.cc/images/blog//file/zisoweketomavixuwuleva.pdfIn PDF document text
    • http://getawaynewzealand.co.nz/wp-content/plugins/formcraft/file-upload/server/content/files/1607a40f993b44---78742828778.pdfIn PDF document text
    • https://miamiuniquelimo.com/wp-content/plugins/formcraft/file-upload/server/content/files/16072d3a41f107---xepaganafugilu.pdfIn PDF document text
    • http://broadviewlibrary.org/uploaded_bvlib/file/15849650668.pdfIn PDF document text
    • http://thecoferfamily.com/clients/7/78/7892d776c92a08c80f86ebc6236678d2/File/pijoxukipipitetafij.pdfIn PDF document text
    • http://fra2ange.it/userfiles/files/17802204235.pdfIn PDF document text
    • http://middlegeorgiacoinclub.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608823095c66d---kebokijivu.pdfIn PDF document text
    • https://n95america.com/wp-content/plugins/super-forms/uploads/php/files/899b59338b3b2b57ef7522f040048fa1/73136283392.pdfIn PDF document text
    • https://www.infrascale.com/wp-content/plugins/super-forms/uploads/php/files/3869eeae546bd08aa24733fdb832a8c6/63303416432.pdfIn PDF document text
    • https://christembassyromford.org/wp-content/plugins/super-forms/uploads/php/files/f8dd6f02bbc46e73f648f84a78a45621/10674357164.pdfIn PDF document text
    • http://sklepjola.pl/userfiles/file/47825475661.pdfIn PDF document text
    • https://visaonline-vn.com/wp-content/plugins/super-forms/uploads/php/files/tp5an79bik1rs9n14s0drg23mg/42272456459.pdfIn PDF document text
    • https://www.karavanlakesfet.com/wp-content/plugins/super-forms/uploads/php/files/b8926c885ea14d01ad078788dc165129/60126707354.pdfIn PDF document text
    • http://1utilaje.ro/mm/file/ritutoxitowatigisis.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_off0000e3a3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE3A3 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000fbb5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFBB5 19872 bytes
SHA-256: d8a606c453ac5241de647ae2f004e69145a8f8156cf20dd16c929346f4cf739f
font_02_sfnt_off00012e27.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12E27 10764 bytes
SHA-256: 846713f50998da1590c94429f67c687b6b7340bdf1896fc6dcac307cfcd52051

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