Malicious PDF — malware analysis report

Static analysis result for SHA-256 c464afbad6709210…

MALICIOUS

PDF

76.1 KB Created: 2021-02-18 23:58:26 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-29
MD5: 66357c73c2deb4914501d0a878769795 SHA-1: 481c0bb6687b397c54a9d3c2d67497be34abda0a SHA-256: c464afbad6709210cc9ca7f1b4ed88c927d3907687767698cf6ef3b5d328ebdc
126 Risk Score

Malware Insights

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

The PDF file was detected as malicious by ML classifiers and ClamAV, indicating a phishing or trojan payload. It contains numerous embedded links, many pointing to disposable hosting services, suggesting a link farm designed to redirect users to malicious content. The document body, though heavily obfuscated, appears to be a lure related to sampling music, which is inconsistent with the technical metadata.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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://jacksth.ru/strik?utm_term=how+to+sample+itunes+songs+in+garageband PDF link annotation
    • https://janogawe.weebly.com/uploads/1/3/0/7/130776821/jopaven_givumejisobif.pdfIn PDF document text
    • http://fifuxuzod.iblogger.org/1339620547.pdfIn PDF document text
    • https://kuxodebareku.weebly.com/uploads/1/3/4/0/134042390/2abffcf764f40.pdfIn PDF document text
    • http://instgramcopyrightdispute.com/how_to_choose_a_trust_lawyerp5ine.pdfIn PDF document text
    • http://vkrowl.com/hibritleme_ve_molekl_geometrisi_ders_notlarraqg6.pdfIn PDF document text
    • https://cdn.sqhk.co/zafupusapun/i4jcqDv/galilurejuwuxoriref.pdfIn PDF document text
    • http://sq11mini.com/265206274846otn7.pdfIn PDF document text
    • https://cdn.sqhk.co/galemojubemo/hhgexha/kajupekewa.pdfIn PDF document text
    • https://dudisavaw.weebly.com/uploads/1/3/1/3/131380109/jamanam-lafezip-lufuk.pdfIn PDF document text
    • https://cdn.sqhk.co/fabozesemi/ifhaiQf/wolf_simulator_2016.pdfIn PDF document text
    • https://cdn.sqhk.co/gukitane/hjjfomo/final_fantasy_all_the_bravest_weapon_drops.pdfIn PDF document text
    • https://cdn.sqhk.co/bidusowo/ejdhcIl/77674760276.pdfIn PDF document text
    • http://amst-watch-v1.club/jotadajuvirdn1cj.pdfIn PDF document text
    • https://motedozanegiraz.weebly.com/uploads/1/3/1/3/131383309/juveximoge-piralut.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://jufomotapi.epizy.com/sobomijuwewarumejerinod.pdfIn PDF document text
    • https://s3.amazonaws.com/kegubinefuda/barron_s_ap_psychology_5th_edition.pdfIn PDF document text
    • http://turixupifebut.epizy.com/bmct_terminal_berthing_report.pdfIn PDF document text
    • https://s3.amazonaws.com/bitajemisajoz/58765209433.pdfIn PDF document text
    • https://s3.amazonaws.com/wifukedot/67304962009.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_off0000ea15.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEA15 5472 bytes
SHA-256: 9f3527d79d2a6cf46631bc238ba45795662d3911205bb7a7e200286f72ef870f
font_01_sfnt_off0000fc9a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFC9A 11240 bytes
SHA-256: c728dee93c1ba8b94fb5f37488df95dd95bcd92446f1c68181ccb30775b639fa

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