Malicious PDF — malware analysis report

Static analysis result for SHA-256 2eecb2133fe016eb…

MALICIOUS

PDF

75.9 KB Created: 2021-06-20 04:46:13 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-24
MD5: 5c4dc33cfdf0d2ffd274f924a780a78d SHA-1: f9b7cf5b27cd5cb42aaead8459cf78f6d78e4a4f SHA-256: 2eecb2133fe016eb6bc53141f50078e295e59c56bd2bd4b53b81db32536be0cf
164 Risk Score

Malware Insights

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

The PDF file is detected as malicious by ML classifiers and ClamAV, indicating a phishing or trojan threat. It contains numerous links to compromised WordPress sites, suggesting a link farm used to host or distribute malicious content. The document body, though heavily obfuscated, contains text related to downloading music, which serves as a lure for users to click on the embedded links.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 7

  • 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.
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • 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://drainscovers.com/wp-content/plugins/super-forms/uploads/php/files/7d4a497d3ad3624f340cd419db1a4ed0/75182951986.pdf In PDF document text
    • https://takiminsahada.com/wp-content/plugins/super-forms/uploads/php/files/6a0rh5q9v171hnhbpscruaicgr/debijug.pdfIn PDF document text
    • http://ck-tct.ru/userfiles/file/jojoxebofevok.pdfIn PDF document text
    • https://realestateconnect.us/wp-content/plugins/super-forms/uploads/php/files/39qajpqv5rs2522orp13nre3t0/dufudiwisofiwud.pdfIn PDF document text
    • http://www.megasaludips.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b059f251ed3---gebud.pdfIn PDF document text
    • https://www.geosuiteonline.de/wp-content/plugins/formcraft/file-upload/server/content/files/160cdc53bceb3f---91031668193.pdfIn PDF document text
    • https://fieldofgreen.com/wp-content/plugins/super-forms/uploads/php/files/b98d2c0df6fee00621163e293bfe1812/92114994116.pdfIn PDF document text
    • http://nedirajtebosnu.net/userfiles/file/zogubumabozimizazovagemu.pdfIn PDF document text
    • https://jclifeschools.org/wp-content/plugins/super-forms/uploads/php/files/62ccc85691af53d2183a7a2a75fd25f4/gamadoku.pdfIn PDF document text
    • https://humanistbeauty.com/wp-content/plugins/super-forms/uploads/php/files/ft1096p4pbms21pnap1koe28ho/fiwamidonepuwiwulubote.pdfIn PDF document text
    • https://editions-tlp.fr/ckfinder/userfiles/files/78804552781.pdfIn PDF document text
    • https://bahamianbrewery.com/ckfinder/userfiles/files/55040225116.pdfIn PDF document text
    • http://axiomestates.com/userfiles/file/64000819690.pdfIn PDF document text
    • http://starlightcelebre.org/clients/4/43/43e9139217482d7666ce300faf566241/File/xupikerifukilodi.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/GLLx1DTH0VQ/uplcv?utm_term=download+lagu+kemesraan+mp3+stafabandPDF 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://scripts.sil.org/OFLIn PDF document text
    • 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_off0000d505.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD505 5820 bytes
SHA-256: fe6a7201f18cb83fa3f5f3dde2c752b9d34799224c18f71195f9d5c236a784de
font_01_sfnt_off0000e8e3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE8E3 10400 bytes
SHA-256: cb7f69e9c025a3c7bcc70f2e17fb348786bd85885a7d043d9b9bbde4c9781fa7
font_02_sfnt_off00010cff.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10CFF 16252 bytes
SHA-256: ca8803ab54afb9ca6598605af7ed4e11ae34d9999b43498998e2cabb18644971