Malicious PDF — malware analysis report

Static analysis result for SHA-256 45e67fdc4655fd7b…

MALICIOUS

PDF

83.1 KB Created: 2021-06-25 12:27:37 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: d52109206e0770a55f54f3f61ee61527 SHA-1: b898b7fc0457022dd807dfeee2019fdcbf504f02 SHA-256: 45e67fdc4655fd7b4bd2a606a30f7ac5075e87f445a5a7717579d9e49e345ea9
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

The PDF contains numerous links, many pointing to compromised WordPress sites, suggesting a link farm or phishing lure. The ClamAV detection and ML classifier strongly indicate malicious intent, likely phishing or malware distribution. The presence of a Google feedproxy URL with a search term suggests a social engineering pretext to drive traffic to the compromised sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9987

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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 http://gingerwooddesign.com/wp-content/plugins/formcraft/file-upload/server/content/files/160aa76e4631c2---75266805977.pdf
    • http://otelm4b.ru/admin/ckfinder/userfiles/files/fomezevawekuwomo.pdf
    • http://stkvn.ru/wp-content/plugins/super-forms/uploads/php/files/ec2550899625d8bfcc281b822b7d67a1/naratalovebafixu.pdf
    • http://cuacuonanbinh.com/userfiles/file/20760910721.pdf
    • https://appvid.eus/userfiles/files/febupeduxejegawonijov.pdf
    • http://ankurgroups.com/userfiles/file/12172732497.pdf
    • https://hogies.com/includes/template/uploads/file/65996960439.pdf
    • http://vudafrique.com/wp-content/plugins/super-forms/uploads/php/files/03f8939a9a6357c1ed1fed047fb1195c/vigomuvanukijogavina.pdf
    • http://nnk.gr/wp-content/plugins/formcraft/file-upload/server/content/files/160b7c897ccea3---roxuwasokujulitawuw.pdf
    • https://pinotcar.com/wp-content/plugins/super-forms/uploads/php/files/70c0cd1b27b7673a9fa4316279ea981d/panuw.pdf
    • https://liniagdanskzydowo.pl/files/welexabutatuxixawuvawu.pdf
    • https://agentcctv.com/userfiles/file/riwisimubojorazudomefilug.pdf
    • http://israel-aliya.com/wp-content/plugins/super-forms/uploads/php/files/1e520ea0165d24f521d08233b33fd72d/panesuwiroxe.pdf
    • https://feedproxy.google.com/~r/skout/mBVl/~3/YTWXjIUwRh0/uplcv?utm_term=archaeology+textbook+pdf
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/
    • http://dejavu.sourceforge.net
    • http://dejavu.sourceforge.net/wiki/index.php/License

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e246.bin
8f5dc7d2ded738638c9ebac5d12f533fd265bfe6fad208e3d6f7c85c6524ad9a		 pdf-font-stream PDF embedded font (sfnt) at offset 0xE246 17180 bytes
font_01_sfnt_off00010edc.bin
db9323c0d08927988e3bce8a74cf098c7ab73c37bd6fe5a22026c7c836935eb6		 pdf-font-stream PDF embedded font (sfnt) at offset 0x10EDC 10964 bytes
font_02_sfnt_off00012819.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1		 pdf-font-stream PDF embedded font (sfnt) at offset 0x12819 16792 bytes

Open this report in the interactive analyzer, or submit your own file for analysis.