Malicious PDF — malware analysis report

Static analysis result for SHA-256 201f9828bb0d8207…

MALICIOUS

PDF

79.5 KB Created: 2021-04-07 20:47:57 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-22
MD5: 2e8f0c0a7fa53665a437b6a6dc2f5048 SHA-1: 04d449971f9b1f1a1b15b5d65937f7d281431744 SHA-256: 201f9828bb0d82076e1b061145faf0024a5862fc1636a5eec230a72eff76eeb8
126 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution T1059.007 JavaScript

The PDF contains numerous embedded URLs, many of which point to disposable domains, and is flagged by ML classifiers and ClamAV as malicious. The heuristic 'PDF_SEO_DISPOSABLE_LINK_FARM' indicates a link farm on disposable hosting, suggesting a phishing or malware distribution attempt. The presence of external URIs and the overall structure strongly suggest the document is intended to redirect users to malicious sites, likely for phishing or to download further payloads.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9993

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/123?utm_term=diablo+2+merc+guide+v1.+13 PDF link annotation
    • http://sellamorem.com/896378189865osrh.pdfIn PDF document text
    • http://esagafow.fun/hospital_management_system_project_report_in_cllwyb.pdfIn PDF document text
    • http://naxovigemelewe.iblogger.org/metro_mapa.pdfIn PDF document text
    • http://my-favshopc.online/dead_space_3_android9l5rx.pdfIn PDF document text
    • http://zelafagilu.iblogger.org/caso_clinico_de_balantidium_coli.pdfIn PDF document text
    • http://gidepel.22web.org/popibexodeniwurexedar.pdfIn PDF document text
    • http://kakerusejom.iblogger.org/50107549940.pdfIn PDF document text
    • http://fbdirect.site/95045730362xnj6i.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://uploads.strikinglycdn.com/files/0f1028aa-b836-4a08-8f3e-8cbb41ac32c8/lopametupodikatub.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/fe0ea900-8434-4956-a2e8-8ce9753c2965/mercury_9.9_4_stroke_parts_manual.pdfIn PDF document text
    • http://doxekapop.rf.gd/75281339153.pdfIn PDF document text
    • https://s3.amazonaws.com/gidibesuxi/gizekivomorilosu.pdfIn PDF document text
    • http://sizatopus.rf.gd/advantages_and_disadvantages_of_barter_system.pdfIn PDF document text
    • http://tagugatukosag.epizy.com/81402247103.pdfIn PDF document text
    • http://sisuwexiwidal.epizy.com/lurapidurogojomuz.pdfIn PDF document text
    • http://tipisekoj.epizy.com/the_postman_always_rings_twice_movie_watch_online.pdfIn PDF document text
    • https://s3.amazonaws.com/pevuwarobuvowa/sonic_all_stars_racing_transformed_cheats.pdfIn PDF document text
    • http://bidasumibave.epizy.com/cae_test_2_answers.pdfIn PDF document text
    • https://s3.amazonaws.com/sizabo/australian_passport_application_checklist.pdfIn PDF document text
    • http://nadefivetokilak.rf.gd/79941932481.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/98f009a9-87ed-4aaf-995c-6152c6424281/reflexive_verb_french_activities.pdfIn PDF document text
    • https://s3.amazonaws.com/pobixedele/wd_my_passport_ultra_not_backing_up.pdfIn PDF document text
    • http://fenaxamapug.rf.gd/75888663136.pdfIn PDF document text
    • https://s3.amazonaws.com/dumupa/14246967309.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_off0000f568.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF568 5660 bytes
SHA-256: 72fab53228f84f2b4636db02a3a189636d3b6c02fc377f5447682fcf285888fa
font_01_sfnt_off000108ad.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x108AD 12040 bytes
SHA-256: 0051fc40e9c87bdb6f53e7a3a5c191a2a6c6e75c58efa341b7a1a480c087d3a4

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