Malicious PDF — malware analysis report

Static analysis result for SHA-256 1ad9bb3b1343278f…

MALICIOUS

PDF

80.9 KB Created: 2021-06-09 01:56:27 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-27
MD5: c8c6f0b22d641f30d5ae7c054ef1bf9c SHA-1: b4dd6624b7adb3ae86afdba4f8d55305a5844f04 SHA-256: 1ad9bb3b1343278f31ec55ea191fbff6069e25f0d8ec22fc56c50bda20ec281b
156 Risk Score

Malware Insights

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

This PDF document was flagged by ML classifiers and ClamAV as malicious, specifically as a phishing trojan. It contains numerous links, many pointing to compromised WordPress sites, designed to redirect users to potentially harmful content. The presence of 'call of mini zombies mod apk unlimited money' in a URL suggests a lure for potentially pirated or malicious software.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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 https://laborke.ru/uplcv?utm_term=call+of+mini+zombies+mod+apk+unlimited+money PDF link annotation
    • https://medgarlci.com/wp-content/plugins/super-forms/uploads/php/files/1c9e51bbdc82e6cf32e924f68b87f187/92467466641.pdfIn PDF document text
    • https://spherule.org/wp-content/plugins/super-forms/uploads/php/files/aefa878899af3485bd4aeaed811852e9/jilirijisozadevuxud.pdfIn PDF document text
    • https://plswa.com/wp-content/plugins/super-forms/uploads/php/files/ee22c98b0ac70c540fde44c1fde723fe/vebologoriv.pdfIn PDF document text
    • https://lawpropertyconsultants.co.uk/wp-content/plugins/super-forms/uploads/php/files/r2k3btpuafusr25caadaghfral/82694870226.pdfIn PDF document text
    • http://ahchala.com/img/file/92931561321.pdfIn PDF document text
    • https://www.caesarstravel.com/wp-content/plugins/formcraft/file-upload/server/content/files/160977f8b9a97a---56654956958.pdfIn PDF document text
    • http://phuocthuan.vn/images/pic/file/fiwananitomuta.pdfIn PDF document text
    • https://communeouchamps.fr/userfiles/file/weginaranijifusokutu.pdfIn PDF document text
    • https://srp-galabau-rostock.de/wp-content/plugins/super-forms/uploads/php/files/9etf8s6bd67hpedo1s96jilnsd/sosumopojisas.pdfIn PDF document text
    • http://veterinariomauracotti.it/userfiles/files/28078997542.pdfIn PDF document text
    • http://redwoodpwr.com/wp-content/plugins/super-forms/uploads/php/files/m6duopb047d553ftbuf8oe6fh2/18589804005.pdfIn PDF document text
    • https://www.sir.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/1609b8c8ad5376---50190433937.pdfIn PDF document text
    • https://www.novet.de/wp-content/plugins/formcraft/file-upload/server/content/files/160ac1e1590e76---kumefaketufososaxos.pdfIn PDF document text
    • https://arizonapoolcontractor.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609ae25f7ab2d---41829156538.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In 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

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e77c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE77C 5352 bytes
SHA-256: 1c0ca7e32070405311da5188c9b4c79b23a8ba489c00f42e299a8c7f9f8789c6
font_01_sfnt_off0000f9b4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF9B4 20628 bytes
SHA-256: 8c73abf052582f476014499a9b68cb8295c8e300137aceb2e29b28c41aeb4865
font_02_sfnt_off00012850.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12850 4324 bytes
SHA-256: 05d2457133b820fa77aa358e30e9acfbad3f04c46ced9a37296d9311117db176