Malicious PDF — malware analysis report

Static analysis result for SHA-256 65059f1fa1d3d3e9…

MALICIOUS

PDF

71.7 KB Created: 2021-02-17 21:49:08 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-23
MD5: 9a7174a295598363cd571943a5cc7235 SHA-1: abb1b210208eb17ae4cf3d8b0b90e220e9ec13e8 SHA-256: 65059f1fa1d3d3e9854806d4b69a15b0144d278a67f3280565b23bd9505dee4c
186 Risk Score

Malware Insights

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

The PDF contains numerous external links, indicating it is part of a link farm. The ClamAV detection and ML classifier strongly suggest malicious intent, likely related to phishing or SEO manipulation. The embedded URLs point to domains that are likely part of this malicious infrastructure.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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://maypoin.ru/strik?utm_term=in+the+on+the+job+feature+emotional+labor+in+the+workplace PDF link annotation
    • https://cdn.sqhk.co/wefekoferu/IrhgL1k/widnes_vikings_score_2019.pdfIn PDF document text
    • https://cdn.sqhk.co/fewibefanid/Izkh0hd/nodibefonifabisutapig.pdfIn PDF document text
    • http://mabay.fun/tudujovevita8ua5z.pdfIn PDF document text
    • https://cdn.sqhk.co/bulunazi/Ivwjhig/sun_tzu_art_of_war_quotes_enemy.pdfIn PDF document text
    • https://vatifogogunubit.weebly.com/uploads/1/3/4/7/134725392/8251847.pdfIn PDF document text
    • http://milansit.space/51767504416nugz5.pdfIn PDF document text
    • http://tubipiguposazi.22web.org/81185444285.pdfIn PDF document text
    • https://cdn.sqhk.co/ligumorik/jhjcYhc/94495761821.pdfIn PDF document text
    • http://perinolaguzur.iblogger.org/aadukalam_movie_status.pdfIn PDF document text
    • http://stepka2016.xyz/gapexusiwhfb6.pdfIn PDF document text
    • http://good-production18.site/el_poder_de_la_oracion_persistentewjpoa.pdfIn PDF document text
    • http://tortomsk.ru/dinakidixesateliw13fv.pdfIn PDF document text
    • http://pushbiz.fun/vizetujivenewiba9pttr.pdfIn PDF document text
    • https://cdn.sqhk.co/kavesake/ajh5Fjb/vopolumubexofekoferebul.pdfIn PDF document text
    • http://nuveclovet.xyz/facebook_messenger_video_call_android_not_workingtnyqr.pdfIn PDF document text
    • http://best-store.club/43563406718pldrg.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://dopodisimedu.epizy.com/career_word_search_puzzle_answer_key.pdfIn PDF document text
    • http://zaxiwuxenur.rf.gd/kumomikaxivoxaxujimutobu.pdfIn PDF document text
    • https://s3.amazonaws.com/foneniz/free_basic_job_application_template.pdfIn PDF document text
    • https://s3.amazonaws.com/veledabejufi/14167826341.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_off0000da85.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDA85 5388 bytes
SHA-256: 5a95a688dd59c06ea567a351bbc39287c0c3aec27e557db35e0da4f229185ab9
font_01_sfnt_off0000ecc7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xECC7 10724 bytes
SHA-256: 80c00c6f5cf1c1f7db4ee5858fe6707d31fa182086dea06d3c09710de0315611

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