Malicious PDF — malware analysis report

Static analysis result for SHA-256 969fc5427eed225c…

MALICIOUS

PDF

77.9 KB Created: 2021-08-29 00:08:53 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-11-24
MD5: 491b5e44880c28f9a5970783c4d5aa70 SHA-1: 5a7fe6f1091401a84e0a30731337b6ff2f479305 SHA-256: 969fc5427eed225cd0b25ad86e76b2bc15e3395165eb39dd956502045ce3bc3f
156 Risk Score

Malware Insights

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

The PDF file contains a link farm, directing users to multiple external URLs. Several of these URLs point to compromised CMS upload storage, indicating a potential phishing or malware distribution scheme. The ML classifier and ClamAV detection strongly suggest malicious intent, likely to lure users to malicious content or exploit vulnerabilities.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9976

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://0vote.com/ckfinder/files/fogarejikozerufevi.pdf In PDF document text
    • http://resetimpianti.it/reset/public/file/fewigaxivivopise.pdfIn PDF document text
    • http://zoncmswebsitebeheer.nl/files/editor/file/faxegelagi.pdfIn PDF document text
    • http://bhk-aindling.de/userfiles/files/76926629564.pdfIn PDF document text
    • http://sklepjola.pl/userfiles/file/xasexobarefewiwetepuwixu.pdfIn PDF document text
    • http://www.caribbeandentist.com/wp-content/plugins/formcraft/file-upload/server/content/files/16117e0e765bf3---rixoriwemadonuvugofogu.pdfIn PDF document text
    • https://gulertrafik.com/wp-content/plugins/super-forms/uploads/php/files/4ki6rasolj2haq2oh2pooh90l4/fajabugazinegumiw.pdfIn PDF document text
    • https://loan-financial.com/wp-content/plugins/super-forms/uploads/php/files/5c7a5fc42b2e32546965b24b37a53a59/95975445528.pdfIn PDF document text
    • https://www.lokalesichtbarkeit.de/wp-content/plugins/super-forms/uploads/php/files/65i4dhg047jgt3nn5ml7r91b2f/8583802946.pdfIn PDF document text
    • http://thebrownbag.vn/upload/files/42140194663.pdfIn PDF document text
    • https://aliencosmicexpo.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a2dbf678c7f---64489349529.pdfIn PDF document text
    • http://villkasz.hu/editor_up/panumoduginorim.pdfIn PDF document text
    • https://protechlighting.com/wp-content/plugins/super-forms/uploads/php/files/172833c2dcc35d821b41dbd4b9735f84/bipakinomixojo.pdfIn PDF document text
    • https://www.officinadelgustoroma.com/wp-content/plugins/super-forms/uploads/php/files/5a0b88ffcd09c036d84f15638efd8a05/bawima.pdfIn PDF document text
    • http://brenno-tojestto.pl/userfiles/file/sifedakabireduzip.pdfIn PDF document text
    • https://atraba-holding.com/userfiles/file/bagitafuwedoliwon.pdfIn PDF document text
    • http://ahxxzx.com/userfiles/202105/file/disisofi.pdfIn PDF document text
    • http://zonwering-belgie.eu/ckfinder/userfiles/files/ginorukuvufitunosikabuda.pdfIn PDF document text
    • http://veronicanealhome.com/wp-content/plugins/formcraft/file-upload/server/content/files/2/16098f7046517c---437563714.pdfIn PDF document text
    • http://recko.ru/ckfinder/userfiles/files/rowunumovox.pdfIn PDF document text
    • http://straub-online.ch/userfiles/files/detosojutibenuditesuru.pdfIn PDF document text
    • https://energooptima.hu/upload/File/94801190320.pdfIn PDF document text
    • http://firstcuwire.com/file_media/file_image/file/76397307672.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/ngfLrbzwjls/uplcv?utm_term=oxford+current+english+grammar+exercisePDF 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_off0000c3a0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC3A0 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000dbb2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDBB2 19820 bytes
SHA-256: ba78053cbaa1f416f3f1411d8c1dca0c5226324fd20cdea436f91eb5fcbef9ca
font_02_sfnt_off00011008.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11008 11152 bytes
SHA-256: 6118aa0b12da21097c69d51fbdd1a23c5b8b26cbbff6a622d91fb8dd7a030928

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