Malicious PDF — malware analysis report

Static analysis result for SHA-256 960d63f0b271bb7a…

MALICIOUS

PDF

69.8 KB Created: 2021-02-28 21:40:47 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-12
MD5: e21bd8109f211271931872eb00c7d62f SHA-1: 2d59c9027d5df1e3fb902c41ae91709856d9cafe SHA-256: 960d63f0b271bb7a2dada435a580b3db6d55197e2325b62849211b0f73530d57
126 Risk Score

Malware Insights

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

The PDF contains multiple embedded URLs, with one specifically appearing as a search result for song chords, suggesting a lure. The ML classifier and ClamAV detection strongly indicate malicious intent, likely for phishing or malware delivery. Although no scripts were explicitly extracted, the PDF structure and embedded URIs are indicative of malicious activity.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

Heuristics 5

  • 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 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://jottigo.ru/strik?utm_term=king+of+my+heart+chords+pdf+key+of+c PDF link annotation
    • http://formblckr1.xyz/barbie_christmas_carol_dolls5a15.pdfIn PDF document text
    • http://eliyalte.com/causes_of_vietnam_war_worksheet4uwrr.pdfIn PDF document text
    • http://sevezor.scienceontheweb.net/wumizubafama.pdfIn PDF document text
    • http://xariketixagat.mypressonline.com/xofomijuk.pdfIn PDF document text
    • http://winoorama.website/527202095788903i.pdfIn PDF document text
    • http://feyakast.online/columbian_exchange_dbq_answer_keynq37d.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://sonogobujajeva.rf.gd/ameropa_berlin.pdfIn PDF document text
    • http://sutexuvidag.myartsonline.com/mustang_2070_skid_steer_parts_manual.pdfIn PDF document text
    • http://zonafikepejese.onlinewebshop.net/does_salt_draw_out_infection_in_tooth.pdfIn PDF document text
    • https://s3.amazonaws.com/tinajabizoreguf/annapurna_pictures_contact_information.pdfIn PDF document text
    • http://jusakurufawotol.rf.gd/76864679747.pdfIn PDF document text
    • http://duvodix.myartsonline.com/how_to_reset_the_control_lock_on_a_whirlpool_duet_dryer.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_off0000d0fc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD0FC 5672 bytes
SHA-256: aae9944097fd81418654d01020ec391d747a1be7bfeb1eedba164ae5450080c8
font_01_sfnt_off0000e435.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE435 11196 bytes
SHA-256: 3933cb32b9796d49bd2a3a046d56333798c1ba56c61dff8f15b368cca67ec911

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