Malicious PDF — malware analysis report

Static analysis result for SHA-256 e3befb55ddd81a80…

MALICIOUS

PDF

69.6 KB Created: 2021-09-26 20:48:47 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-23
MD5: 37d57ebc781db733ecf4d25ab4aa8afe SHA-1: ec0e0c05f01ebf3b618ebaf81a85c81b47c9158e SHA-256: e3befb55ddd81a80d189c8f78381ec8c30191082cf209e4fb96fb12007e35610
126 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The file was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. It contains numerous embedded URLs pointing to potentially malicious sites, with one heuristic specifically identifying it as a link farm on disposable hosting. The presence of external URIs and the overall structure suggest a phishing or malware distribution attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9975

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://pistant.ru/uplcv?utm_term=carrom+pool+latest+version+apk PDF link annotation
    • http://spielundlicht.de/content_provider/documents/files/wuzojurusavipijagevi.pdfIn PDF document text
    • http://bndweb.nl/upload/files/49088071258.pdfIn PDF document text
    • http://wirtrauenuns.ch/images/file/70392793848.pdfIn PDF document text
    • http://tythb.cn/uploadfile/files/66327490693.pdfIn PDF document text
    • https://jmcoverseaspvtltd.com/uploads/files/menidoleginesuv.pdfIn PDF document text
    • http://pnmanagementsolutions.in/uploads/56157174348.pdfIn PDF document text
    • http://manegedebuitenwijck.nl/uploads/file/32174259233.pdfIn PDF document text
    • https://menu2uplus.com/images/file/rogofitebi.pdfIn PDF document text
    • http://kortennis.co.kr/B/ck/ckfinder/userfiles/files/30580548533.pdfIn PDF document text
    • https://allegypttours.net/userfiles/files/15057576586.pdfIn PDF document text
    • http://rkmaster.ru/uploads/files/30439651387.pdfIn PDF document text
    • http://sdtrafficticketlawyer.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/23514049792.pdfIn PDF document text
    • http://www.aceitunasdelguadalhorce.es/ckfinder/userfiles/files/gepav.pdfIn PDF document text
    • http://coral-travel66.ru/admin/ckfinder/userfiles/files/fuvajidu.pdfIn PDF document text
    • https://stillwaiting.org/userfiles/file/gujuboruzimujija.pdfIn PDF document text
    • http://www.vikingmaterials.com/img/nodaze.pdfIn PDF document text
    • http://pass38.com/images/contentimages/files/80538941574.pdfIn PDF document text
    • http://fairway.cc/images/blog/file/kowasigumukoxibada.pdfIn PDF document text
    • http://sonnenheizung.ch/fckeditor/editor/images/file/tekamoriber.pdfIn PDF document text
    • http://merwepizza.com/upload/file/21386041181.pdfIn PDF document text
    • http://ganan10.co.il/wp-content/plugins/formcraft/file-upload/server/content/files/1614286a60e051---63163569750.pdfIn PDF document text
    • https://bomando.bomsolar.com/uploadfiles/files/sedaninupiledewedawarokup.pdfIn PDF document text
    • https://k9-warrior.com/wp-content/plugins/super-forms/uploads/php/files/lsbg92nrpcjc4i1u0nbe5r5goh/biravinujuwetedutulaxuk.pdfIn PDF document text
    • http://haithuanphat.com/uploads/files/pilodumam.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_off0000b2e1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB2E1 10604 bytes
SHA-256: ce2bf9cf6985186de0e706887bdf406de55cf462fb395fef51f2b924d6a131f7
font_01_sfnt_off0000cb20.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCB20 15132 bytes
SHA-256: cd7a94de70057acc795d5257df1291b7fda80ea400acc6b899278ff9e298e2ec
font_02_sfnt_off0000f062.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF062 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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