Malicious PDF — malware analysis report

Static analysis result for SHA-256 7c73e0db3dff3d82…

MALICIOUS

PDF

70.0 KB Created: 2021-02-27 01:48:40 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-22
MD5: e40f7a3b070eaf86c937bb6e338eebab SHA-1: 54f6194dba9e245c1aa52af327368282754aa386 SHA-256: 7c73e0db3dff3d828bc6b917f53a42ca6f6c1e595954454573f03b3b969bd836
126 Risk Score

Malware Insights

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

This PDF file was flagged as malicious by ML classifiers and ClamAV, indicating a high likelihood of malicious intent. The PDF contains numerous embedded URIs pointing to various domains, suggesting it functions as a link farm designed to redirect users to potentially harmful content. The presence of external URIs and the 'link farm' heuristic strongly indicate a phishing or redirection attack.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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://jumiwimov.ru/strik?utm_term=genius+g3500+manuale+italiano PDF link annotation
    • http://mini-cam-v2.club/should_a_soccer_player_lift_weightsic1vm.pdfIn PDF document text
    • http://losinglotterynumbers.com/wow_rogue_legendary_daggerso1x0w.pdfIn PDF document text
    • https://cdn.sqhk.co/nojedajoze/jM9pnjc/pro_guitar_tuner_online_microphone.pdfIn PDF document text
    • https://cdn.sqhk.co/mudemodox/6jbYJ9f/61813316469.pdfIn PDF document text
    • http://jegotaraxipux.iblogger.org/rojeragusilunasabafatel.pdfIn PDF document text
    • http://tezibif.mygamesonline.org/fd130_duo_quick_reference_guide.pdfIn PDF document text
    • http://fajivujozivezur.22web.org/30483913842.pdfIn PDF document text
    • http://azakalaza5.xyz/78153735092mhe54.pdfIn PDF document text
    • https://cdn.sqhk.co/figakeves/CeQgjgf/xugafoxanepokuziva.pdfIn PDF document text
    • https://cdn.sqhk.co/xekemini/dcghygc/xubuseverep.pdfIn PDF document text
    • http://helpcenterbusiness.xyz/lowevarukozian9o6.pdfIn PDF document text
    • http://sivelural.mygamesonline.org/24428498320.pdfIn PDF document text
    • https://cdn.sqhk.co/samojusive/KigwAgg/bitmoji_extension_not_working.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://gaxilitexu.onlinewebshop.net/1_milimetro_cuantos_centimetros_son.pdfIn PDF document text
    • http://segudufarus.epizy.com/runescape_classic_mining_guide.pdfIn PDF document text
    • http://wegupowir.rf.gd/303_tricky_chess_tactics_free.pdfIn PDF document text
    • http://tizovosavudufi.rf.gd/20911839873.pdfIn PDF document text
    • http://ladesefutajon.rf.gd/heropanti_full_movie_300mb.pdfIn PDF document text
    • http://duxegejuw.atwebpages.com/clasificacin_de_los_nmeros_reales_ejercicios.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_off0000d4f3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD4F3 5372 bytes
SHA-256: 70e8badb9f9f82df895424e311a47cce1fecc1fdafc4efebf0051974a13580d8
font_01_sfnt_off0000e732.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE732 10444 bytes
SHA-256: de8fb2adec26a5a67b38cc51ed5a07d356581259036883a8c9948cb02a3f0c6a

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