Malicious PDF — malware analysis report

Static analysis result for SHA-256 d09ea7e0788270b8…

MALICIOUS

PDF

77.1 KB Created: 2021-03-03 19:55:53 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-23
MD5: 874277f5eec23cec227062efcff18fd3 SHA-1: 153dad97a75fbeb7607da697036e8ecd987f3f7a SHA-256: d09ea7e0788270b84b1db20838852130c593571d391ad37cb899945ea906eab0
186 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

This PDF document was flagged as malicious by ClamAV and an ML classifier. The file embeds a large number of external links characteristic of an SEO link farm. Specific URLs and indicators for this sample are listed in the indicators section.

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
  • Small PDF contains mass external PDF link farm critical PDF_SEO_LINK_FARM
    Small PDF contains many clickable external PDF links, mostly clustered on one host. This matches generated SEO/link-farm PDF carriers used to route users into malicious or unwanted-software delivery chains, rather than a normal document citation pattern.
  • 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://gimoguvi.ru/wix?keyword=ge+crock+pot+manual PDF link annotation
    • http://fazejajogavu.medianewsonline.com/wozakegoguromokexab.pdfIn PDF document text
    • https://cdn.sqhk.co/nupozifulija/flhijid/dragon_ball_z_stickman_fighting_games.pdfIn PDF document text
    • http://rokijikin.22web.org/fernando_alonso_annual_salary.pdfIn PDF document text
    • https://cdn.sqhk.co/dovinokobez/bShjCeA/allegiant_phone_number_headquarters.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4450353/normal_60222bb975a3d.pdfIn PDF document text
    • https://cdn.sqhk.co/sabepakofo/jjix04R/rasibuzejupofakepa.pdfIn PDF document text
    • https://cdn.sqhk.co/dubutemaruxu/muqjejh/24822267285.pdfIn PDF document text
    • https://cdn.sqhk.co/mogudekusab/hcjdifd/6861227180.pdfIn PDF document text
    • https://cdn.sqhk.co/kugefiruxat/bqelidE/fibovikile.pdfIn PDF document text
    • https://cdn.sqhk.co/fivufotimad/0Hbynge/flight_attendant_school.pdfIn PDF document text
    • https://kobokudebixisog.weebly.com/uploads/1/3/5/3/135390699/wigivokavidup.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4447085/normal_6037e89adf895.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4452594/normal_600c8d4c6184c.pdfIn PDF document text
    • https://dasatupulike.weebly.com/uploads/1/3/4/1/134131314/1365051.pdfIn PDF document text
    • https://cdn.sqhk.co/xizaxulubezu/VIhgrzd/easy_screen_recorder_app_download.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://zadosuwiwebuw.epizy.com/avira_internet_security_trial.pdfIn PDF document text
    • http://gufolisalowu.rf.gd/what_einstein_told_his_cook_free_download.pdfIn 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

Related samples 8

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000f1bd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF1BD 4996 bytes
SHA-256: 07b1a60fc223c9cb5d2852aa7fb74cd998a2fec3d59b8a57be11b51b79d2c1db
font_01_sfnt_off000102ac.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x102AC 10788 bytes
SHA-256: b3a0dab5954c0f4c61067e978c3c8234c13bd7ce66ed588f96101465a2f5ac10

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