Malicious PDF — malware analysis report

Static analysis result for SHA-256 2e9f5314c9f222d8…

MALICIOUS

PDF

70.4 KB Created: 2021-09-30 15:28:29 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-11-20
MD5: 7ba4cb96ee664e49dbb94d1793397089 SHA-1: 4f6ac660f154ecbaadd3a53263cf369b660cba60 SHA-256: 2e9f5314c9f222d8d50c0b39deaf533b7e442a93c154bbe6b2073f77946bc3a6
126 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains numerous external URIs and is flagged as a link farm on disposable hosting, indicating a phishing or malware distribution attempt. The ML classifier and ClamAV detection strongly suggest malicious intent. Although no scripts were explicitly extracted, the PDF structure and embedded URLs point towards a common attack pattern of luring users to malicious sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9978

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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=chess+beginner+book+pdf PDF link annotation
    • https://tw-itemaos.com/ckfinder/userfiles/files/pevazejozepererivan.pdfIn PDF document text
    • http://saatgaamkansarasamaj.com/admin/uploads/files/88942314435.pdfIn PDF document text
    • http://beauty214.com/uploads/files/202109261853361907.pdfIn PDF document text
    • http://laureysnv.be/uploads/files/35309568066.pdfIn PDF document text
    • https://lexconsulting.ro/webroot/files/media/30697091416.pdfIn PDF document text
    • https://pomacanthe-art.fr/imagebeforeafter/files/kiboposukaravefosax.pdfIn PDF document text
    • https://swotin.com/wp-content/plugins/formcraft/file-upload/server/content/files/16149a1ccb4013---19759386945.pdfIn PDF document text
    • http://bobmeetin.com/media/galleries/files/47990052426.pdfIn PDF document text
    • https://fertilizerproductionprocess.com/d/files/rijid.pdfIn PDF document text
    • http://coming-c.com/userfiles/file/letisanujosekisururas.pdfIn PDF document text
    • http://kaushalacademy.org/ckfinder/userfiles/files/22043414104.pdfIn PDF document text
    • https://printsolutions.ro/uploads/wysiwyg/files/14798170147.pdfIn PDF document text
    • https://ana-jsc.com/upload/files/pagosabalufisewus.pdfIn PDF document text
    • https://reifenscho.de/wp-content/plugins/formcraft/file-upload/server/content/files/1613020e8aa35e---vubaverow.pdfIn PDF document text
    • https://ibexquimica.com.br/ckfinder/userfiles/files/67042064757.pdfIn PDF document text
    • http://kechengchem.com/upload/files/76219883468.pdfIn PDF document text
    • http://chono.mn/uploads/userfiles/files/82613576651.pdfIn PDF document text
    • http://op-gold.com/ck_image/files/vefetodux.pdfIn PDF document text
    • http://pension-erlkoenig.de/img/editor/file/torisexoxogojowewoniji.pdfIn PDF document text
    • http://regmac.net/userfiles/files/fedajopibobopezozavagel.pdfIn PDF document text
    • https://artlabjo.com/userfiles/file/sepigaxalaz.pdfIn PDF document text
    • http://dblbtech.com/userfiles/file/wabulomadiruzobijese.pdfIn PDF document text
    • https://globaltranslation.com/demo/global_translation/beta/userfiles/files/42208091715.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_off0000b320.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB320 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000cb32.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCB32 16036 bytes
SHA-256: 74a9fc2f7296fcf4bcae1aedb1006338f09e5d2c64793abd143093281fc42e86
font_02_sfnt_off0000f3d0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF3D0 10736 bytes
SHA-256: 66dc225fc230819a8815743a4be9d6c5d0e061280b4092648ee84197cdf949e6