Malicious PDF — malware analysis report

Static analysis result for SHA-256 db8f0351c8d8d9c8…

MALICIOUS

PDF

201.8 KB Created: 2021-04-03 02:26:38 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-08-25
MD5: 1d39eae34f9eca62bf91454de6fefc4a SHA-1: 2b5f7626b2beb12d1d1ca5ddd5779df5dabe6f29 SHA-256: db8f0351c8d8d9c8afd37c9ef4072ab8615998429b19d69a91c4465f1adf0e28
156 Risk Score

Malware Insights

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

The PDF contains a lure, identified by the 'PDF_SEO_UTM_REDIRECTOR_LINK' heuristic, which directs users to a suspicious URL. This pattern is commonly used for phishing or to download further malicious content. The ML classifier and ClamAV detection strongly indicate malicious intent, supporting a phishing or trojan delivery attack pattern.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9806

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
  • Image lure linking to an SEO redirector (free-download phishing) high PDF_SEO_UTM_REDIRECTOR_LINK
    PDF embeds an image with little or no body text and a clickable link to a multi-word utm_term / FeedBurner-proxied SEO redirector — the 'free ebook / solution-manual / document download' phishing family that ranks for natural-language search queries and routes the user into a payload/redirect chain. The PDF carries no exploit; the risk is the linked destination. Flagged structurally (image lure + SEO redirector) so it does not depend on a ClamAV/ML signature, and regardless of how many filler text pages the lure carries.
  • Callback phishing phone lure medium SE_CALLBACK_LURE
    Document asks the user to call a phone number in billing, refund, subscription, fraud, or security context — consistent with callback phishing or tech-support scam patterns. Suppressed for legitimate-issuer (IRS/gov/official-form) or Microsoft license-boilerplate documents that carry no urgency or charge/dispute escalation.
  • 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=short+film+script+writing+competition PDF link annotation
    • http://samejeno.iblogger.org/gunegadasexetavigenugabo.pdfIn PDF document text
    • https://cdn.sqhk.co/lipebefaje/ghjidXp/power_bass_1000_watt_amp.pdfIn PDF document text
    • https://cdn.sqhk.co/gabixeme/dpO5gKi/sad_ringtone_mp3_download_tik_tok.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4423752/normal_6002fe8b27fe5.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4384484/normal_604223a90ade2.pdfIn PDF document text
    • https://cdn.sqhk.co/betarudigi/gjjgmic/aptoide_free_apkpure.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4426812/normal_60320e70b4673.pdfIn PDF document text
    • https://cdn.sqhk.co/porevugaz/jhb17TV/accountability_software_free.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4413362/normal_60234b23cd52a.pdfIn PDF document text
    • https://cdn.sqhk.co/wobimore/ayjfGid/start_em_sit_em_running_backs.pdfIn PDF document text
    • http://reguvixelupuj.iblogger.org/71549286050.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/jeponowon/call_me_by_your_name_movie_sequel.pdfIn PDF document text
    • http://tijopuzotozume.rf.gd/ancient_godly_monarch_novela_espaol.pdfIn PDF document text
    • http://tadabafilebe.epizy.com/mebedenodet.pdfIn PDF document text
    • http://rileponabamel.rf.gd/40453466150.pdfIn PDF document text
    • https://s3.amazonaws.com/zijivevip/contact_information_sheet.pdfIn PDF document text
    • https://s3.amazonaws.com/vokeri/voposuzapipuro.pdfIn PDF document text
    • http://woloruvikato.rf.gd/kemble_primary_school_ofsted_report.pdfIn PDF document text
    • http://pafiduwujiredom.epizy.com/92083261202.pdfIn PDF document text
    • https://s3.amazonaws.com/lorifawuvawot/juvaw.pdfIn PDF document text
    • http://rinakarun.rf.gd/xagalikefuvivil.pdfIn PDF document text
    • https://s3.amazonaws.com/ragejufa/mopewi.pdfIn PDF document text
    • https://s3.amazonaws.com/bejikefowu/18171383126.pdfIn PDF document text
    • https://s3.amazonaws.com/gapuruxumeg/arduino_basic_programming_codes.pdfIn PDF document text
    • http://monudoxufanexax.rf.gd/zirijolazefasuwudimebanej.pdfIn PDF document text
    • https://s3.amazonaws.com/xedewofuretujo/cursos_de_marketing_digital_online_gratis_con_certificado_google.pdfIn PDF document text
    • https://s3.amazonaws.com/tujeviwakirawu/46007199729.pdfIn PDF document text
    • https://s3.amazonaws.com/tobito/how_to_get_psa_marriage_certificate_in_singapore.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_off0002dac7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x2DAC7 5416 bytes
SHA-256: 442a832adbadafb70842f4f773976a7554f565c511e6415325189ce916b9b43a
font_01_sfnt_off0002ed24.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x2ED24 12500 bytes
SHA-256: 475c6caeaec65a8c74cce4319c6e27b81b69bb10a546c99b54266c36fe30db10