Malicious PDF — malware analysis report

Static analysis result for SHA-256 c7ac573cc44e49ca…

MALICIOUS

PDF

68.8 KB Created: 2021-06-12 17:54:57 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-24
MD5: 8be90843af4deb7b1252e4a8f09f69fd SHA-1: 68d10be523104e9693daeaff03850b36274e8eaa SHA-256: c7ac573cc44e49ca274b26437e2e23bed8f5cdfff02a494074c6671a93347a93
166 Risk Score

Malware Insights

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

The PDF contains a link farm of 30 URLs pointing to various PDF files, likely intended to obscure the malicious intent and bypass gateway scanning. The heuristic 'SE_PASSWORD_ARCHIVE_LURE' indicates the document likely instructs the user to decrypt an archive, a common tactic for delivering malware. The ML classifier strongly flagged this PDF as malicious, and ClamAV detected it as 'Pdf.Phishing.Trojan'.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9992

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
  • Password-protected archive handoff high SE_PASSWORD_ARCHIVE_LURE
    Document gives password instructions for an archive or attachment — often used to keep payloads encrypted until after gateway scanning
  • 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://pixomot.ru/pbw?utm_term=alan+walker+darkside+piano+sheet PDF link annotation
    • https://zokelafeg.weebly.com/uploads/1/3/4/8/134889419/gijibipabinosu-rinekat-lapoxoxukava.pdfIn PDF document text
    • https://netopanuneju.weebly.com/uploads/1/3/4/4/134493403/fokalud.pdfIn PDF document text
    • https://zudimawavisutet.weebly.com/uploads/1/3/1/6/131606198/fotimasexidoliz.pdfIn PDF document text
    • https://deketonozalupu.weebly.com/uploads/1/3/3/9/133997688/zipedovog.pdfIn PDF document text
    • https://mizefubu.weebly.com/uploads/1/3/4/6/134637235/vujusijapisebi.pdfIn PDF document text
    • https://juxeduwabup.weebly.com/uploads/1/3/0/7/130775558/naximebur.pdfIn PDF document text
    • https://danisamotaroz.weebly.com/uploads/1/3/1/6/131606121/6789321.pdfIn PDF document text
    • https://xotinibawilufo.weebly.com/uploads/1/3/1/4/131437660/jesidutuz_siwirika_varav_bosobokabixowi.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://pusavivo.pbworks.com/f/gakenos.pdfIn PDF document text
    • http://wenitat.pbworks.com/f/40304750565.pdfIn PDF document text
    • http://nuxawakaxaz.pbworks.com/w/file/fetch/144527208/evaluation_sur_la_revolution_francaise_et_lempire_4eme.pdfIn PDF document text
    • http://vazufatar.pbworks.com/f/doraemon_new_movie_in_telugu.pdfIn PDF document text
    • http://fibonilavi.pbworks.com/f/49364516647.pdfIn PDF document text
    • http://kejufavo.pbworks.com/f/twilight_new_moon_full_movie_in_hindi_free_download_worldfree4u.pdfIn PDF document text
    • http://vajaxasave.pbworks.com/w/file/fetch/144473742/nsw_fair_trading_owner_builder_permit_application_form.pdfIn PDF document text
    • http://gatasulupu.pbworks.com/f/60775476912.pdfIn PDF document text
    • http://tefimemovem.pbworks.com/f/respiracin_holotrpica_stanislav_grof_libro.pdfIn PDF document text
    • http://jizakatum.pbworks.com/f/jeepers_creepers_3_full_movie_dual_audio_download_480p.pdfIn PDF document text
    • http://tinigogazos.pbworks.com/f/22016879085.pdfIn PDF document text
    • http://noxixap.pbworks.com/f/43584740817.pdfIn PDF document text
    • http://kukumepubop.pbworks.com/f/big_time_apk_hack.pdfIn PDF document text
    • http://xobapotowi.pbworks.com/f/41022316420.pdfIn PDF document text
    • http://volikedejefa.pbworks.com/w/file/fetch/144421101/51145814308.pdfIn PDF document text
    • http://vikowezanipe.pbworks.com/f/84505153693.pdfIn PDF document text
    • http://pamotekegopa.pbworks.com/f/tezuf.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_off0000ce3b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCE3B 5192 bytes
SHA-256: 01aedcac7883896535b282ed88ccd972ed804f0492819654265b5b5f74979c1c
font_01_sfnt_off0000dff3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDFF3 11000 bytes
SHA-256: 77fab347951bdfb2159a65a16e58a9878ad4d00bdb22014975559ce56af3c5e7

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