Malicious PDF — malware analysis report

Static analysis result for SHA-256 2dabbc313974becc…

MALICIOUS

PDF

163.8 KB Created: 2021-08-14 06:51:07 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-11-23
MD5: 81f34389b79560afeaf660e62754e88a SHA-1: 8618c2d1c9fe5da7b6bc4b198890227dd493acd1 SHA-256: 2dabbc313974beccfeb5d81fbfd6c873358db53133b14489d565a35f4ac712d1
154 Risk Score

Malware Insights

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

The file was detected as a malicious PDF by ClamAV and ML classifiers. It functions as a link farm, directing users to multiple external URLs hosted on compromised or disposable domains. These links are likely intended to facilitate phishing attacks or distribute further malware payloads.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9529

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
  • 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
  • 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://zohopin.com/calisma2/files/uploads/pujusubupade.pdf In PDF document text
    • https://eduinfinite.com/wp-content/plugins/super-forms/uploads/php/files/63f66fde19bf2499882ffbd47c580e5b/patatisifovazujavudape.pdfIn PDF document text
    • https://autosofortkauf.ch/wp-content/plugins/super-forms/uploads/php/files/83ipt10r1cq19nrfn50ketuifk/duzap.pdfIn PDF document text
    • https://unique.global/wp-content/plugins/super-forms/uploads/php/files/998976993aef0a5c21d50569da08890f/5069186232.pdfIn PDF document text
    • http://www.ddd-iasi.ro/wp-content/plugins/formcraft/file-upload/server/content/files/1608339a4cdce3---sujubewudifojov.pdfIn PDF document text
    • https://spazmedia.com/wp-content/plugins/formcraft/file-upload/server/content/files/161009b5f20648---41607929443.pdfIn PDF document text
    • http://poolprotektor.com/userfiles/file/10028798243.pdfIn PDF document text
    • https://treasurehunterdetectors.com/ckfinder/userfiles/files/54405761977.pdfIn PDF document text
    • http://www.mtpartnersfl.com/wp-content/plugins/formcraft/file-upload/server/content/files/160bdc2e0a36a0---pegigirozofoxofekegalepat.pdfIn PDF document text
    • https://saraelv.no/wp-content/plugins/formcraft/file-upload/server/content/files/160c2f8dbbe9e3---gajodaridujetojesoniguk.pdfIn PDF document text
    • https://segurosjdd.com/wp-content/plugins/super-forms/uploads/php/files/eck9q3ma8bl95625j26uch9oh2/48494673942.pdfIn PDF document text
    • https://primewestelectrical.com/wp-content/plugins/super-forms/uploads/php/files/29f3c2f12f127cb6dad3dfdb0f5557da/27820437720.pdfIn PDF document text
    • http://hoanggiaphatstone.com/upload/files/nekitodugagidadarulamol.pdfIn PDF document text
    • https://pointvirgule.ca/upload/editor/file/wugijiliv.pdfIn PDF document text
    • http://friluftsgruppen.se/wp-content/plugins/formcraft/file-upload/server/content/files/1608700d87773c---90981865070.pdfIn PDF document text
    • https://alphacleanwashing.com/wp-content/plugins/super-forms/uploads/php/files/d73822f9a0062bdd075d07d7ee11e83d/zenedupuxepatugojipik.pdfIn PDF document text
    • http://www.hkqi.com/wp-content/plugins/formcraft/file-upload/server/content/files/1610e043132013---zubomi.pdfIn PDF document text
    • https://eternalbliss.net/file/97459655500.pdfIn PDF document text
    • http://trackeg.com/en/wp-content/plugins/formcraft/file-upload/server/content/files/16077af4875e97---wakubuko.pdfIn PDF document text
    • http://ozkayalarlojistik.com/userfiles/file/mokerome.pdfIn PDF document text
    • https://x-software.cz/data/file/vixopikerugewewamegemu.pdfIn PDF document text
    • https://facades-et-traditions.com/actualites/file/sudum.pdfIn PDF document text
    • https://pluviaterra.mx/wp-content/plugins/super-forms/uploads/php/files/491d8bdea66b71483383fb5b00093c6a/77893226007.pdfIn PDF document text
    • http://d4smontreal.com/clients/f/f5/f58105ca183540932673f5bf18e62671/File/41784783468.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/PmAiG5ZyT-k/uplcv?utm_term=sistemas+de+ecuaciones+diferenciales+lineales+ejercicios+resueltos+pdfPDF link annotation
    • 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_off000225d3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x225D3 11084 bytes
SHA-256: 0b18b70173851ab9e7325f5c604453d2f7b400fb79f75ab9c137da8531018610
font_01_sfnt_off00023f63.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x23F63 2300 bytes
SHA-256: 38ddad13918a88b8cc48a9b8f2b8f64f0adacd931ecf1acd24b0b5a5a76e6061
font_02_sfnt_off00024a5d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x24A5D 22408 bytes
SHA-256: 5228de5340b5739af31f12337418fee56595c7c059ccb47879b55332c7738214