Malicious PDF — malware analysis report

Static analysis result for SHA-256 0ee8d810814fb1c4…

MALICIOUS

PDF

72.4 KB Created: 2021-06-03 12:55:01 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-27
MD5: f7dcf072dde67b197c1259a0358beecd SHA-1: 374cc21bcfda5def38e15737582dc2d0c7404c58 SHA-256: 0ee8d810814fb1c461cea3f3df34dd3842741a0fc2167313cbdac983fec556c1
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

This PDF document is classified as malicious by ML models and ClamAV, indicating a high likelihood of malicious intent. It contains numerous links to external websites, many hosted on compromised WordPress sites, suggesting a link farm or phishing lure. The document body, though heavily obfuscated, appears to be a deceptive lure related to job responsibilities, likely intended to redirect users to malicious sites for further exploitation.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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://archism.ru/uplcv?utm_term=what+is+a+finance+manager+roles+and+responsibilities PDF link annotation
    • http://www.dnevi-sekretarjev.eu/wp-content/plugins/formcraft/file-upload/server/content/files/1607c8d48bba35---sovifaminowolumide.pdfIn PDF document text
    • https://shared401k.com/wp-content/plugins/super-forms/uploads/php/files/96db073db6cc37c1085ce03ff3f61218/42515644393.pdfIn PDF document text
    • http://ipsgroupjjn.org/userfiles/file/nunawigikowusa.pdfIn PDF document text
    • http://extreamtuning.ru/wp-content/plugins/formcraft/file-upload/server/content/files/16071816968e98---sifefeka.pdfIn PDF document text
    • https://boucherienabli.com/uploads/FCK_files/file/75861204636.pdfIn PDF document text
    • http://am-assets.com/aom/magnolia/userfiles/file/13488481887.pdfIn PDF document text
    • https://relleno-acidohialuronico.com/wp-content/plugins/super-forms/uploads/php/files/56b898af16af5f6ffbfd8880f1458238/24595713432.pdfIn PDF document text
    • http://pusancard.com/userData/board/file/96030828049.pdfIn PDF document text
    • https://agribusiness.pk/wp-content/plugins/formcraft/file-upload/server/content/files/1607509e3ccc2d---fowupimijalox.pdfIn PDF document text
    • http://pck.malopolska.pl/wp-content/plugins/super-forms/uploads/php/files/ece9c2d5b77eef308af80f9cbeb448b0/redonefesakefekojuz.pdfIn PDF document text
    • http://jucal.es/images/file/xaragusepitixub.pdfIn PDF document text
    • https://adm.allianceflooring.net/wp-content/plugins/super-forms/uploads/php/files/e81350e97620d85a05511e471dff1a13/73485252657.pdfIn PDF document text
    • http://www.bestlifepolicy.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/160ada17d1bae7---xejegugoguvarirajexinig.pdfIn PDF document text
    • https://cspdental.com/wp-content/plugins/super-forms/uploads/php/files/93b85a11dab535d18cf172648e2a8e9f/15312355805.pdfIn PDF document text
    • https://cradlegold.com/wp-content/plugins/super-forms/uploads/php/files/3dfeh41l3d0b2spjkmjhnqi8pc/2649651921.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn 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 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000da1c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDA1C 5724 bytes
SHA-256: 4e07270944cf0d109cd6eb6002f3a2db7873103e4fb546e063d62e231dd4ad4f
font_01_sfnt_off0000ed75.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xED75 11008 bytes
SHA-256: f3553a30968d984afe69c59376ac6e6db944df1ed13088a3299fb058e76c74a9