Malicious PDF — malware analysis report

Static analysis result for SHA-256 2a8e668762059df0…

MALICIOUS

PDF

88.4 KB Created: 2021-09-01 22:48:32 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-05
MD5: 3a424546fe4a6181f1335d9e80b74ec5 SHA-1: 8e4e846b59763575146e40877cd0c520d44186d8 SHA-256: 2a8e668762059df0fcc1ae068b7666af2304c2722309a94fefc3798b392f25f7
156 Risk Score

Malware Insights

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

The PDF was flagged by ML classifiers and ClamAV as malicious, specifically as a phishing trojan. Heuristics indicate it functions as a link farm, directing users to multiple potentially compromised websites hosted on various domains. The document body is unreadable, but the presence of numerous external URIs and the 'PDF_SEO_DISPOSABLE_LINK_FARM' heuristic strongly suggest a phishing or malicious redirection attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9993

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://rickgrisolia.com/userfiles/files/kisanefajabawokex.pdf In PDF document text
    • https://www.alongsideasia.com/wp-content/plugins/super-forms/uploads/php/files/f14d0b68f19c3def3a2a8347be76b030/diburorizudexumome.pdfIn PDF document text
    • http://agroanaliz.by/upload/editor/files/jemiliwusapogevapeweme.pdfIn PDF document text
    • http://photo-preiss.com/upload_files/files/11007568907.pdfIn PDF document text
    • https://www.formwork.co.uk/wp-content/plugins/super-forms/uploads/php/files/6kccgui35rkva6fstbotcuonuk/6601740826.pdfIn PDF document text
    • https://www.blackandwhite-salon.com/wp-content/plugins/super-forms/uploads/php/files/tmp/88203791835.pdfIn PDF document text
    • https://bataretak.com/img/files/file/vunefaxakimuwipefi.pdfIn PDF document text
    • http://kaufdeinauto.de/wp-content/plugins/formcraft/file-upload/server/content/files/1609f8a49002b9---6340903890.pdfIn PDF document text
    • http://lapenya.cat/imgjovesnaves/file/gagolofuraj.pdfIn PDF document text
    • https://mamproducciones.es/wp-content/plugins/formcraft/file-upload/server/content/files/16079ddbf106ca---gibipomezisuperari.pdfIn PDF document text
    • https://habibitours.net/ckfinder/userfiles/files/13427857120.pdfIn PDF document text
    • http://soepcentrale-dekeyser.be/userfiles/file/sagimisawavulakipaxere.pdfIn PDF document text
    • http://www.emporiocaritaspisa.it/wordpress/wp-content/plugins/formcraft/file-upload/server/content/files/160f98f9d91119---8993000347.pdfIn PDF document text
    • http://hurtmar.pl/Upload/file/voretiwebupu.pdfIn PDF document text
    • http://yenidenyuzlendirme.com/ckfinder/userfiles/files/69318793557.pdfIn PDF document text
    • http://wib24-admin.de/uploads/file/30145323760.pdfIn PDF document text
    • http://congtrinhnhaviet.vn/upload/files/kuraxizikef.pdfIn PDF document text
    • http://proxima-design.cz/files/file/ritisepuriseduguvufe.pdfIn PDF document text
    • http://www.whirlpool-beachcomber.at/wp-content/plugins/formcraft/file-upload/server/content/files/1607aa9baab344---gatimotupasaweseb.pdfIn PDF document text
    • http://xecuoihuyhoang.com/uploads/userfiles/file/78598488421.pdfIn PDF document text
    • http://www.myhhsi.com/wp-content/plugins/super-forms/uploads/php/files/ecb7e8e3700141d0590801875a978426/85929458689.pdfIn PDF document text
    • https://e-tta.com/app/webroot/userfiles/files/70964194456.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/BvfzZFkJO3s/uplcv?utm_term=master+of+master+gland+in+human+bodyPDF 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

Related samples 8

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000f2f9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF2F9 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off00010b0b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10B0B 17884 bytes
SHA-256: 9a0721956ddcbf8201ae03492994aec04a0dbca70fab4e458c74b05e38f2725f
font_02_sfnt_off00013967.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13967 11148 bytes
SHA-256: a149ada0e456c7d2163b141d1eaef12260ead51af7d10e7102cfe95e6f59d548

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