Malicious PDF — malware analysis report

Static analysis result for SHA-256 02e84f588706197a…

MALICIOUS

PDF

102.4 KB Created: 2021-07-01 15:04:52 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 98763fb07ad5c13e24caf2b6ec3bb230 SHA-1: 53af1bc103190b8d6030fccb45c79252b4000b44 SHA-256: 02e84f588706197a8e939d2cf91ae06d8e3b24e5b567607f733a9e4de91fd575
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

The PDF contains numerous external links, many pointing to compromised CMS uploads or disposable hosting, indicating a link farm or phishing attempt. The ML classifier and ClamAV detection strongly suggest malicious intent, likely to redirect users to malicious sites or download further payloads. No scripts were extracted, but the structure and URL patterns are indicative of a phishing or SEO poisoning campaign.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9806

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://nappsa.org/userfiles/file/livikolegexuzejeruf.pdf
    • http://liebherr-tr.com/userfiles/file/26682747242.pdf
    • https://apexforestservices.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608856d24ba9e---gafudopakupuxe.pdf
    • https://ludifrance.fr/userfiles/file/26958053392.pdf
    • http://bebelino.ru/userfiles/file/29067797442.pdf
    • http://ruoumoc.com/upload/files/79409046196.pdf
    • http://70sromans.com/clients/871711/File/botibatuxekazuvagag.pdf
    • http://www.iso-clean.fr/wp-content/plugins/formcraft/file-upload/server/content/files/160809d85d5fe8---giborifeboserosazogo.pdf
    • http://elesud.it/img_pagine/file/48046498637.pdf
    • http://lifestyleufa.ru/wp-content/plugins/super-forms/uploads/php/files/e856e5c7d2ad9cc1f530abafe60791a8/womereta.pdf
    • http://www.assignproject.com/wp-content/plugins/formcraft/file-upload/server/content/files/16084452ae36b3---sutuxulagiz.pdf
    • http://www.vivelamusica.es/wp-content/plugins/formcraft/file-upload/server/content/files/16071f455ca4cf---21202420824.pdf
    • http://braintradingbcn.com/wp-content/plugins/super-forms/uploads/php/files/c06f07cb201d358a38d56da01aa6f03e/38968693924.pdf
    • https://rebel-guitars.com/wp-content/plugins/super-forms/uploads/php/files/f3cc0c9848a1f53230c22dc85deba956/zixerapefopugumowe.pdf
    • http://heilpraxis-pankow.de/wp-content/plugins/formcraft/file-upload/server/content/files/160cb316cd27bd---muvabazudevezuvuso.pdf
    • http://africanhairbraidingsalon.com/userfiles/file/23008355788.pdf
    • https://classconnbio.com/img-jacson/files/11680159152.pdf
    • http://iamsoldierfit.com/wp-content/plugins/formcraft/file-upload/server/content/files/160752cdd6b983---bagalumulumevatub.pdf
    • http://www.pattyn360.com/upload/forum/files/28900794477.pdf
    • https://arenda1s.ru/wp-content/plugins/super-forms/uploads/php/files/2c6799c7501bbc2154e34083f0b80fbe/dagum.pdf
    • http://eske.hu/wp-content/plugins/formcraft/file-upload/server/content/files/1607f16965fb03---21386980953.pdf
    • https://kalatranslation.co.uk/wp-content/plugins/super-forms/uploads/php/files/lcb7fhksnpf05j6jlusnk4t411/88884895159.pdf
    • https://feedproxy.google.com/~r/skout/mBVl/~3/cv9VXjIrmdE/uplcv?utm_term=indian+aloes+wood
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/
    • http://dejavu.sourceforge.net
    • http://dejavu.sourceforge.net/wiki/index.php/License

Extracted artifacts 5

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000fcbb.bin
b0440a3dca0a0424a119a50c62f93a2d11c941be80870d7a4e22f5293662cd3a
pdf-font-stream PDF embedded font (sfnt) at offset 0xFCBB 10080 bytes
font_01_sfnt_off00011348.bin
a43f88f130b2c5718d84fb1d16d6173949a8d633470b1950274f02fb08632249
pdf-font-stream PDF embedded font (sfnt) at offset 0x11348 17852 bytes
font_02_sfnt_off00012f3e.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0x12F3E 16792 bytes
font_03_sfnt_off0001474b.bin
a068e162753eecc378775acd3fe310b41edcac19490b56562c7babdb471a2e80
pdf-font-stream PDF embedded font (sfnt) at offset 0x1474B 4504 bytes
font_04_sfnt_off00015809.bin
388b9765fcc1638ac910637bbc41b1dd56d8bbcf6e0e7aae37e04f97a77c9a21
pdf-font-stream PDF embedded font (sfnt) at offset 0x15809 21008 bytes