Malicious PDF — malware analysis report

Static analysis result for SHA-256 649f7eb4cec384a0…

MALICIOUS

PDF

74.7 KB Created: 2021-06-10 08:45:47 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 3560a66cff62b1fd1b8d690c328aa8c2 SHA-1: 89eb5e79e125f73dc9c752f3bae55b68100a1a71 SHA-256: 649f7eb4cec384a08cf81ee3a66e61f2a700f041f198cc84950ff299a31f251c
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

This PDF file is detected as malicious by multiple heuristics and a machine learning classifier. It contains a link farm pointing to various domains, many of which appear to be compromised WordPress sites used for hosting malicious files. The document body, though heavily obfuscated, suggests a lure related to hotel searches, likely intended to trick users into visiting malicious URLs for phishing or malware delivery.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9690

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://drafthe.ru/uplcv?utm_term=hotels+near+paseo+de+gracia
    • http://diversecityuk.com/userfiles/file/8393250152.pdf
    • http://atlantichomeportugal.com/wp-content/plugins/formcraft/file-upload/server/content/files/16080efb006755---60587203988.pdf
    • http://portalcom-b2b.es/img/user///file/_0766041001620317030.pdf
    • https://gservicepz.com/wp-content/plugins/super-forms/uploads/php/files/8f35cfdcfedea5c358404b74f6e35b3e/96644677116.pdf
    • https://www.3dreamchurch.com/wp-content/plugins/super-forms/uploads/php/files/83658eeceae0f67cc55695ba4ba5011d/kudigovutusevi.pdf
    • http://in-dapt.com/wp-content/plugins/formcraft/file-upload/server/content/files/16080ee0d8103c---51501089226.pdf
    • https://pluviaterra.mx/wp-content/plugins/super-forms/uploads/php/files/2a1c625794b8aa2bea4144861aee30db/dukazele.pdf
    • http://hakanemlak.net/yukleme_klasoru/userfiles/file/98674914137.pdf
    • http://www.1000ena.com/wp-content/plugins/formcraft/file-upload/server/content/files/160aca615bce51---15691298624.pdf
    • https://bevelec.com/bevelec/dossierMois/file/jagumejimitexuxoseresanel.pdf
    • http://www.scmphotography.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/16072266c1e805---12927288227.pdf
    • https://sellerflows.com/wp-content/plugins/super-forms/uploads/php/files/3daacc978b8b28354cee92e4bcd12669/lagotevonukewug.pdf
    • https://wcdt.co.th/wp-content/plugins/super-forms/uploads/php/files/oh6de0r4kt4skjkfeov89l1412/fajutelakokubo.pdf
    • https://www.gsccn.it/wp-content/plugins/formcraft/file-upload/server/content/files/160aba6ff8833a---28998370118.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://scripts.sil.org/OFL

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e8be.bin
0a4b5c31f4257e5a2707017370dcf829c84058060820f6748bf1d2aeb2c81f0e		 pdf-font-stream PDF embedded font (sfnt) at offset 0xE8BE 3044 bytes
font_01_sfnt_off0000f392.bin
6fe01ab3c00344212bf9993dd1d68623522dc6154aa8ee4fb5991f80cff03f14		 pdf-font-stream PDF embedded font (sfnt) at offset 0xF392 5204 bytes
font_02_sfnt_off0001054f.bin
e2deae1e2b7852fe09c30bb3b3d5cd9917057d0800c177afe9e116e36dddb35a		 pdf-font-stream PDF embedded font (sfnt) at offset 0x1054F 11684 bytes

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