Malicious PDF — malware analysis report

Static analysis result for SHA-256 d1a62de7d6542d04…

MALICIOUS

PDF

90.2 KB Created: 2021-07-02 11:53:02 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-09-15
MD5: 8d65e1c8ae367bac6e6be38c5f8dfd6d SHA-1: 83d57ec386e116955a6a23262e7b49bb37c65085 SHA-256: d1a62de7d6542d04143f4119c037a03360dee5a78b25638023c1e54aafdf6722
156 Risk Score

Malware Insights

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

The PDF file was identified as malicious by ML classifiers and ClamAV, specifically as a phishing trojan. It contains numerous links pointing to compromised WordPress sites, suggesting it's designed to lure users to malicious content. The document body is heavily obfuscated and unreadable, providing no direct clues about its specific intent beyond the heuristic findings.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9942

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=view+pdf+files+on+samsung+smart+tv PDF link annotation
    • http://deurwater.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a238ff853ce---85189031952.pdfIn PDF document text
    • http://icsbc.ru/fuploader//file/dewinudapegumim.pdfIn PDF document text
    • http://grupopiscis.com/upload/files/90075321091.pdfIn PDF document text
    • https://pluckywize.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b65cdedea93---99284823301.pdfIn PDF document text
    • http://www.bufolari.com/public/immagini/file/bekuvevujodijamifuzusa.pdfIn PDF document text
    • https://accesoriosalmayor.com/images/userfiles/file/92610310166.pdfIn PDF document text
    • http://nnk.gr/wp-content/plugins/formcraft/file-upload/server/content/files/16081121042620---dafaxokude.pdfIn PDF document text
    • http://osc-pribor.ru/products_pictures/file/nalafasejesexifulekexa.pdfIn PDF document text
    • http://www.chinahkcarplate.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a73443bc5c7---40472623325.pdfIn PDF document text
    • http://asianmosaicnyc.com/userfiles/file/bijabanumudopikuropuporu.pdfIn PDF document text
    • http://dom-nenilovo.ru/wp-content/plugins/super-forms/uploads/php/files/a0e392b2077ffd90c4ecb0efe93572c0/66444325846.pdfIn PDF document text
    • http://xperion.hu/wp-content/plugins/super-forms/uploads/php/files/9a14671843c556cb1cd1cc6628720c96/30893441758.pdfIn PDF document text
    • http://lhs60to70.com/clients/3/32/32806278e47d7e4d905c37b1d6ebf04a/File/tiwowisotibezume.pdfIn PDF document text
    • https://circolodelpistone.ch/userfiles/file/54281864067.pdfIn PDF document text
    • https://www.dynasil.com/wp-content/plugins/super-forms/uploads/php/files/2b78cfeaa3d6538b43b5bb01eff9f8fe/xirotowemavuti.pdfIn PDF document text
    • http://lacasedescaraibes.fr/file/fajuwogoduripazepawa.pdfIn PDF document text
    • https://alkhairi.co.uk/wp-content/plugins/super-forms/uploads/php/files/e3adb6e5358798128ebc87d5fe35a909/veriratezono.pdfIn PDF document text
    • http://www.onegelha.com/wp-content/plugins/super-forms/uploads/php/files/eafd1f4294097dd01893d852d2b789ad/zetafutu.pdfIn PDF document text
    • https://izharfoster.com/wp-content/plugins/formcraft/file-upload/server/content/files/160aa61e69a3fe---49270000195.pdfIn PDF document text
    • https://laneopx.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608b9d42b0719---rabive.pdfIn PDF document text
    • https://getadoc.in/ckfinder/userfiles/files/zufanikovaxevu.pdfIn PDF document text
    • https://usssecuritate.ro/userfiles/file/xasagosasuru.pdfIn PDF document text
    • https://www.sgestrecho.es/wp-content/plugins/formcraft/file-upload/server/content/files/160843a4544b66---59618966070.pdfIn PDF document text
    • http://countrysquirefoods.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608605f3e9a47---77169128311.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_off0000fda5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFDA5 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off000115bc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x115BC 11064 bytes
SHA-256: bab316d28aabf9d69a78a668f620bb2bcaab14414eac824f821592d48d1e2415
font_02_sfnt_off00012f57.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12F57 16996 bytes
SHA-256: bb980ba01ff4b10104078991f81d43832a677368297498996151ece3ff08e7e3

Open this report in the interactive analyzer, or submit your own file for analysis.