Malicious PDF — malware analysis report

Static analysis result for SHA-256 7553895484af5d1c…

MALICIOUS

PDF

68.1 KB Created: 2021-05-06 18:24:10 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 7f652fefa3e21bb2b6b04ed4e99040c1 SHA-1: 5ef227a5b549253a4809f0404a67a2c2839e23d8 SHA-256: 7553895484af5d1cb65df116eb5e018b4b23fe6bdaef7ac7455377f6f73412d2
174 Risk Score

Malware Insights

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

This PDF file was detected as malicious by ClamAV and an ML classifier. It contains numerous embedded URIs pointing to various domains, many of which appear to be compromised WordPress sites used for hosting PDF files. The document body is heavily obfuscated, but the presence of multiple links suggests an attempt to redirect users to malicious content, likely for phishing or malware distribution.

Machine Learning

  • Nyx PDF Classifier malicious score 0.8311

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
  • Clickable URI points to raw IP address medium PDF_URI_IP_LITERAL
    PDF contains a clickable HTTP(S) action whose host is a literal IPv4 address. Legitimate documents normally link to named domains; raw-IP destinations are common in disposable phishing and malware-delivery infrastructure.
  • 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://garglob.ru/uplcv?utm_term=game+dreadout+2+pc
    • http://europeanprofservices.com/wp-content/plugins/formcraft/file-upload/server/content/files/16082ef4bce3ef---32231421423.pdf
    • http://thanhlamresort.vn/wp-content/plugins/formcraft/file-upload/server/content/files/16070262497efb---dotagaginafavikiguwe.pdf
    • http://az4group.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/16076b40dcd104---16151734103.pdf
    • https://apparel.allianceflooring.net/wp-content/plugins/super-forms/uploads/php/files/1773c075660e869cd6868d90fb632cfe/29308167694.pdf
    • http://trenermichal.pl/wp-content/plugins/formcraft/file-upload/server/content/files/160778844394e8---62916799897.pdf
    • https://blackknowledge.com/wp-content/plugins/super-forms/uploads/php/files/d2eeae61882706c2fbc5ff7df39019f9/likasotiwusowafuzamijus.pdf
    • https://acornschoolcharleston.org/wp-content/plugins/super-forms/uploads/php/files/fd2da4db78e9079483141478e6ad7587/1750689729.pdf
    • http://entone.es/wp-content/plugins/super-forms/uploads/php/files/d4f312cca0880f4072f573519ef7e893/31435757013.pdf
    • https://maydongy.com/wp-content/plugins/super-forms/uploads/php/files/sqr3fp9u3jvhfghfu99v7png0o/wesate.pdf
    • https://www.acetechnology.co.in/wp-content/plugins/super-forms/uploads/php/files/iii4qehpehi1bh31hfb1vnu1n4/lidusagozamukafi.pdf
    • http://79.170.40.182/boothtastic.com/wp-content/plugins/formcraft/file-upload/server/content/files/160704242f3cb1---44140440478.pdf
    • https://communeouchamps.fr/userfiles/file/98623265346.pdf
    • http://kingspec.su/wp-content/plugins/super-forms/uploads/php/files/34gpsocqm1hd2h1daj40nn9v0r/nawowul.pdf
    • http://mobydick-band.de/fckdata/file/lobep.pdf
    • http://www.neslihanonur.com/wp-content/plugins/super-forms/uploads/php/files/41a03cb905466a471078e1867e059558/89025680077.pdf
    • http://stylist.in.ua/wp-content/plugins/formcraft/file-upload/server/content/files/1606ebb9f77c9d---fidunexosopojaw.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://scripts.sil.org/OFL

Extracted artifacts 1

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000faac.bin
0c7db8e797a56530cfefbb48ef003d46c81532c797964d8000e1b3ddf75dfc76		 pdf-font-stream PDF embedded font (sfnt) at offset 0xFAAC 5172 bytes

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