Malicious PDF — malware analysis report

Static analysis result for SHA-256 678603fb46cb88ff…

MALICIOUS

PDF

88.5 KB Created: 2021-07-25 15:02:06 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-09-18
MD5: cabe8e936754a42dbba3bfe6756e1891 SHA-1: f00db67ac338ee3e9cb2885f2fd0a86f0be5b12e SHA-256: 678603fb46cb88ff876992d1ee7a4264308ee0d35a7a02ad19911c82e8ca7ee5
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF document was flagged as malicious by ClamAV and an ML classifier. The file embeds a large number of external links characteristic of an SEO link farm, many hosted on compromised CMS upload directories. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9954

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://inlandautorepairmurrietaca.com/wp-content/plugins/super-forms/uploads/php/files/1e78f031e8e2dd79a5e9fbeedcaae40f/mageseviwebelobiva.pdf In PDF document text
    • https://eternalbliss.net/file/rodimopurafubewufejesimo.pdfIn PDF document text
    • http://xn--90ad5ackt1d.xn--p1ai/wp-content/plugins/super-forms/uploads/php/files/38312b36afb3917788295c96417c1f87/fikoxusevaximemosuzuniz.pdfIn PDF document text
    • https://ag-concept.ru/wp-content/plugins/super-forms/uploads/php/files/653c78ade2d1fd351f366f925224d266/41325693022.pdfIn PDF document text
    • http://xn--42-6kcdlkbomh7beggito5p.xn--p1ai/userfiles/file/mibezikumalob.pdfIn PDF document text
    • https://sgdivorcelawyers.com/wp-content/plugins/super-forms/uploads/php/files/3ad064f1fb405e12a77e28b20bb8cbb3/96824789431.pdfIn PDF document text
    • http://findusafranchise.com/files/files/20287793033.pdfIn PDF document text
    • http://market-oborudovanie.ru/upload/file/fukonexaberepowod.pdfIn PDF document text
    • https://glowskincare.net/wp-content/plugins/super-forms/uploads/php/files/d17454f3f146b20ce6dc9ee3ad861495/gilemuwadalunaru.pdfIn PDF document text
    • http://waterreducer.cn/d/files/xosatuzugotulu.pdfIn PDF document text
    • https://oknoplus-omsk.ru/wp-content/plugins/super-forms/uploads/php/files/149a3d046d6ff3c6b308bcd46d2a598e/2661523144.pdfIn PDF document text
    • https://brylka-kfz.de/wp-content/plugins/formcraft/file-upload/server/content/files/160afd0dd7fd5e---zozoxiregit.pdfIn PDF document text
    • https://mlbcsimleague.com/ckfinder/userfiles/files/tazilisomopazebedi.pdfIn PDF document text
    • http://sbsinternationalschool.org/sbsisnew/userfiles/file/dejiboviga.pdfIn PDF document text
    • http://cherishedmomentphotos.com/clients/8/84/84fe84b553acfcd191e166b7401b6f02/File/zofumekigat.pdfIn PDF document text
    • http://aire-limpio.com/img/editor/file/xojosimapalagesurig.pdfIn PDF document text
    • http://test.uebersetzungen-nesselberger.de/wp-content/plugins/formcraft/file-upload/server/content/files/160c1d8c3326b0---78155147752.pdfIn PDF document text
    • https://bizdrive.nl/wp-content/plugins/formcraft/file-upload/server/content/files/1/1607875870d3dc---13106833476.pdfIn PDF document text
    • http://eperon-kochersberg.com/img_db/tatojozeka.pdfIn PDF document text
    • http://www.sandipmallick.com/fckimages/file/80282706767.pdfIn PDF document text
    • https://havanic.com/cache/fck_files/file/vobosimawixoratapemi.pdfIn PDF document text
    • https://jclifeschools.org/wp-content/plugins/super-forms/uploads/php/files/8011daf375a7fa65bd2eccb3a44a874e/nofusukikazikijul.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/fzgW7-mxBc0/uplcv?utm_term=miya+bhai+dj+song+download+mp3+pagalworld+320kbpsPDF 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

Extracted artifacts 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000dc8f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDC8F 16640 bytes
SHA-256: 838f899af2ae1eb810330fadb09b23e239ee6b70c4ae613563ff20584cd037f9
font_01_sfnt_off0000f383.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF383 11576 bytes
SHA-256: 85d41291b0c845c6dd1af8d1418ffa0227a130d362e2729ef6034501ef20973a
font_02_sfnt_off00010e63.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10E63 17132 bytes
SHA-256: 508d3eb5fb03d1110324849883c779bb3783d39fe8532b61ee354f2c4aabf968
font_03_sfnt_off00013b63.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13B63 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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