Malicious PDF — malware analysis report

Static analysis result for SHA-256 c166dbc749303b29…

MALICIOUS

PDF

76.3 KB Created: 2021-04-12 05:27:26 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-22
MD5: 3052b3de50b5ee26fa145e7788bd2230 SHA-1: 703dc3dabd4b6004f38b16fb209c4eacb016ff4a SHA-256: c166dbc749303b297633bdddab577410961b94faf0ebb3e7675ec3ff56e3245b
126 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

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 0.9999

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://golowaki.ru/strik?utm_term=what+are+the+key+features+of+romantic+poetry PDF link annotation
    • https://static.s123-cdn-static.com/uploads/4376375/normal_5ff4cfccde410.pdfIn PDF document text
    • http://smartline58.ru/cartoon_character_drawing_tutorialuxyxd.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4473903/normal_602b6f4c1e542.pdfIn PDF document text
    • https://galujamisone.weebly.com/uploads/1/3/1/8/131871568/diferix.pdfIn PDF document text
    • http://kevirikadu.iblogger.org/simuza.pdfIn PDF document text
    • http://zhk-rekord.info/how_to_draw_anime_hair_easy_girl878gl.pdfIn PDF document text
    • http://bonusiotsbera.online/game_emulator_ppsspp_android_terbaikaieei.pdfIn PDF document text
    • http://mail-autoscout24.net/530934766089m8b0.pdfIn PDF document text
    • http://lynciguest.com/77681194692egn8h.pdfIn PDF document text
    • https://nuzukozifazo.weebly.com/uploads/1/3/2/6/132682871/fosefoxo.pdfIn PDF document text
    • http://fitit.space/el_viaje_del_heroe2bhyu.pdfIn PDF document text
    • http://nyvelsets.online/viraxigagefavsr1.pdfIn PDF document text
    • http://obschee.xyz/96993505942kb24m.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://gamemogap.epizy.com/free_adobe_audition_1._5_full_crack.pdfIn PDF document text
    • http://jesudojisa.rf.gd/beach_buggy_racing_app.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/d2f8a88b-aed7-43ee-a987-7731c6c21a87/hayward_ecostar_sp3400vspvr.pdfIn PDF document text
    • http://xozutafutigifa.rf.gd/wigumaseloniwa.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/3387dffb-9d72-43c5-9e64-15e8b057cbb6/65531248909.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

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000ec2c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEC2C 5404 bytes
SHA-256: 2fa2b39d69e874c6baf6385189ae9b65adc7110a3b3584667e41fbb95ecdb421
font_01_sfnt_off0000fe7c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFE7C 10528 bytes
SHA-256: 668f45dcff62d45e3fb94c2fa61388c8f2ffae05c3b8c53922b7d03f0834e793

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