Malicious PDF — malware analysis report

Static analysis result for SHA-256 5658546d64e69dcc…

MALICIOUS

PDF

98.9 KB Created: 2021-06-12 17:25:51 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-26
MD5: 88a6e1e5b24a083dfe298bcce4cd4c15 SHA-1: f3ad62acbd3f5986c1becc6846c209cbab716b80 SHA-256: 5658546d64e69dcc171c85a68c58bd6143da9d47b2a3309139a3a0393b87a7a3
156 Risk Score

Malware Insights

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

This PDF file was flagged as malicious by ClamAV and an ML classifier. It functions as a link farm, containing numerous URLs pointing to compromised WordPress upload directories and other disposable hosting sites. The embedded document body text, though heavily obfuscated, appears to be a lure related to 'Tamil songs 1980 to 1995', suggesting a phishing or content-luring campaign. No scripts were extracted, but the primary attack pattern involves redirecting users to malicious or compromised external sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9994

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://pixomot.ru/uplcv?utm_term=tamil+songs+1980+to+1995 PDF link annotation
    • http://grupogmec.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607dfb1cd5171---fejipe.pdfIn PDF document text
    • https://fizjolech.pl/userfiles/file/79350729172.pdfIn PDF document text
    • http://www.greenbriarpropmgmt.com/wp-content/plugins/super-forms/uploads/php/files/2a78c01ff5e8314c3d15edae00b8631d/36219434575.pdfIn PDF document text
    • http://sbox-technology.com/upload/datoteke/72668858164.pdfIn PDF document text
    • https://www.amiunaorchestra.ro/wp-content/plugins/formcraft/file-upload/server/content/files/1606f0476dcfd9---5166239224.pdfIn PDF document text
    • http://totalfinance.ca/wp-content/plugins/formcraft/file-upload/server/content/files/160c38fcfbd615---32051177151.pdfIn PDF document text
    • https://amezdigital.com/wp-content/plugins/super-forms/uploads/php/files/1b2304c8657b075303cae38b3e28d1f7/vinakuge.pdfIn PDF document text
    • https://blackknowledge.com/wp-content/plugins/super-forms/uploads/php/files/2c6fbb6cbe412508e8299f7bb46ccbc6/68846105925.pdfIn PDF document text
    • http://chicagohalo.com/wp-content/plugins/formcraft/file-upload/server/content/files/160816c7d51bac---19313733242.pdfIn PDF document text
    • https://ltgtrends.com/wp-content/plugins/super-forms/uploads/php/files/583d13bda025b06c93220153d7459d15/83392250354.pdfIn PDF document text
    • https://flycam.com.tr/wp-content/plugins/formcraft/file-upload/server/content/files/1606d578fcc040---zonabukovonidumadumoxupe.pdfIn PDF document text
    • https://growlocals.com/wp-content/plugins/super-forms/uploads/php/files/1115e5314ff46b5b6e25bd14eb6220ed/8980014018.pdfIn PDF document text
    • http://amadpich.com/userfiles/file/xuwazalepufawisizuf.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://fedorahosted.org/lohitIn PDF document text
    • 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 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0001128a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1128A 5528 bytes
SHA-256: f65f2b2efc2af3bd744247ae628dbf82f19863bdb25fc884d057f9da0056d1ca
font_01_sfnt_off00012546.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12546 11168 bytes
SHA-256: fd252fa23dcaba0c1256a9b1712d29d3bba98d15068e5357dc4e9b0127b05364
font_02_sfnt_off00014229.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x14229 10924 bytes
SHA-256: bab0816c888104b0f3ca5bc7cbad07d99958e2f3d0f9ee21acc7a4a4c8711d30
font_03_sfnt_off000167a8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x167A8 16140 bytes
SHA-256: 159427b32ed66bfbde86def5e6c2992bde67dfb25400c4000a37c9b59b949b61

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