Malicious PDF — malware analysis report

Static analysis result for SHA-256 49e0a66dbaa3f631…

MALICIOUS

PDF

138.6 KB Created: 2021-07-06 08:26:37 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-08-25
MD5: f61e048448f80ef2fafcf9d1a7207c0c SHA-1: b6fe512bbc9d7101c5c29a4f70131537746bf6e7 SHA-256: 49e0a66dbaa3f63130ac45fd54384f9b1a78073ce29ff0ab94f08b966c339e79
156 Risk Score

Malware Insights

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

The PDF file was flagged by multiple heuristics as a link farm, with several URLs pointing to compromised CMS upload storage. The ML classifier and ClamAV also identified it as malicious, specifically as a phishing trojan. The document body is heavily obfuscated, but the presence of numerous external links suggests an attempt to redirect users to potentially harmful sites, likely for phishing or malware distribution.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9943

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://dixietemporarystorage.com/wp-content/plugins/super-forms/uploads/php/files/3757fbff88388c0b6daa3da6e781b889/78251211070.pdf In PDF document text
    • http://manixcnc.com/ckupload/files/wagozafezovovixiro.pdfIn PDF document text
    • https://yenhuy.vn/upload/files/reladekejolebupidonobemo.pdfIn PDF document text
    • https://christembassybarking.org/wp-content/plugins/super-forms/uploads/php/files/899ed4fb659d4e602688865fe2ee03e2/83359120134.pdfIn PDF document text
    • https://sf-tfi-pgu.uz/wp-content/plugins/super-forms/uploads/php/files/87baa676b8233df1e04b28a9020bdb2d/kiwenanodajixajunepitupow.pdfIn PDF document text
    • https://www.lang-mayer.de/wp-content/plugins/formcraft/file-upload/server/content/files/160a0922555f0d---solujisux.pdfIn PDF document text
    • http://jhferry.com/data/fckeditor/file///ropefuzotu.pdfIn PDF document text
    • https://bloomland.com/sites/bloomland.com/files/20885965776.pdfIn PDF document text
    • https://www.wflorlando.com/wp-content/plugins/super-forms/uploads/php/files/0b2539caefe6d5c0dbdacf293c3fc621/jijunag.pdfIn PDF document text
    • https://endoaccessories.com/wp-content/plugins/super-forms/uploads/php/files/15fckb5q49sd0o3suq8ci92pud/towawujogapetipomusunodu.pdfIn PDF document text
    • https://www.focus.mu/wp-content/plugins/super-forms/uploads/php/files/ab2a4f89c95cdc5f98e06ecd6506e305/38518728452.pdfIn PDF document text
    • https://ahi.com.ua/wp-content/plugins/super-forms/uploads/php/files/fda1da6fd0ad7f5c0284b630bbd175e2/18254827331.pdfIn PDF document text
    • https://atl-50.com/files/file/479918700.pdfIn PDF document text
    • http://mai-colle.jp/userfiles/file/42460339098.pdfIn PDF document text
    • https://advancedbusiness.co/wp-content/plugins/super-forms/uploads/php/files/19252198de3fc96e294d8865b5fb8e74/47857919273.pdfIn PDF document text
    • https://feriaesotericadeatocha.com/wp-content/plugins/formcraft/file-upload/server/content/files/160bcae6ce8cc7---59983133242.pdfIn PDF document text
    • http://speaklifeiamgreatness.com/files/files/11099506120.pdfIn PDF document text
    • https://lightsourceindiana.com/wp-content/plugins/super-forms/uploads/php/files/46aa83b2c122b76530ff9927ba2fecb9/tedegodivebamuxu.pdfIn PDF document text
    • https://www.bouldersudbury.org/wp-content/plugins/formcraft/file-upload/server/content/files/1607a471f63d31---31438528788.pdfIn PDF document text
    • https://m-co.de/wp-content/plugins/super-forms/uploads/php/files/tlu68dhcuq4plcmrc3qotppaok/98061585206.pdfIn PDF document text
    • https://veglifekc.org/wp-content/plugins/super-forms/uploads/php/files//11154274008.pdfIn PDF document text
    • http://bergfin.se/wp-content/plugins/formcraft/file-upload/server/content/files/1609494ff6ce26---55526594816.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/LPIa9PGmDLg/uplcv?utm_term=data+structure+manual+solutionsPDF 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_off0001b6e6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1B6E6 10492 bytes
SHA-256: 2b2de6012a1f358f9510d87f8d80e3e6a9d5e004c02edeeb9793c8bfeadcaf7e
font_01_sfnt_off0001cec4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1CEC4 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off0001e6d6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1E6D6 20104 bytes
SHA-256: 0d7aa3a4557f4f2c9794de71e74a63051f2506f3b190a45d295cd1951479bed5

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