Malicious PDF — malware analysis report

Static analysis result for SHA-256 af023fe007361a4d…

MALICIOUS

PDF

101.2 KB Created: 2021-02-28 00:58:12 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-06-30
MD5: bc54e6bd45440354da1174ba9ecfd446 SHA-1: 5c49ab09e867f47e134019cd5cd1b0093a4d7df7 SHA-256: af023fe007361a4dff73dee6ff6315becb0709bbc6d5b0f858defd1e48ac1651
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 URLs, many of which are part of a link farm designed to redirect users to various download locations, including one that appears to be a lure for 'Agatha Christie Poirot TV series download'. The presence of multiple disposable hosting domains and UTM parameters suggests a phishing or malware distribution campaign.

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://druttle.ru/strik?utm_term=agatha+christie+poirot+tv+series+download PDF link annotation
    • https://cdn.sqhk.co/sakupiraf/iZJcZgb/clash_royale_cards_ranked_2019.pdfIn PDF document text
    • https://cdn.sqhk.co/mejabutumu/322vf5a/20810635233.pdfIn PDF document text
    • http://liketime.fun/2202655727phpp9.pdfIn PDF document text
    • https://simofegike.weebly.com/uploads/1/3/1/6/131636923/58a4b.pdfIn PDF document text
    • http://repair-telefonov.ru/dot_belahan_jiwa_lagu37480.pdfIn PDF document text
    • https://nolulanulupu.weebly.com/uploads/1/3/1/3/131379612/gipamiduwosefoz_rejuberulelu.pdfIn PDF document text
    • https://lijipowurop.weebly.com/uploads/1/3/4/3/134314174/8149477.pdfIn PDF document text
    • https://latiratigu.weebly.com/uploads/1/3/1/1/131164156/8608a61c.pdfIn PDF document text
    • http://air-calm2.club/hp_deskjet_2545_ink_advantage_sterowniki49mvt.pdfIn PDF document text
    • http://obmenkalnr.online/75441378764ea910.pdfIn PDF document text
    • http://powerpoint4you.ru/79529809332vj2i.pdfIn PDF document text
    • http://xosuvirakogaf.iblogger.org/how_to_troubleshoot_whirlpool_duet_washer.pdfIn PDF document text
    • https://cdn.sqhk.co/sopiloroda/chchb6k/zupuzazamipugebipunu.pdfIn PDF document text
    • https://cdn.sqhk.co/kukisigafumi/7LAgehc/mini_warriors_three_kingdoms_wiki.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://fuxufotab.epizy.com/johnson_electric_holdings_annual_report.pdfIn PDF document text
    • http://mobotifiriw.epizy.com/38012751016.pdfIn PDF document text
    • http://xofududegotu.epizy.com/xujetomugilomixupobixedur.pdfIn PDF document text
    • http://xosufatobula.rf.gd/ladofuvikosu.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
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000139b0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x139B0 5476 bytes
SHA-256: e9d2b531237b45fd655df2724e06f1cfd84835f6c60e1d141745062f2e86b8b4
font_01_sfnt_off00014c66.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x14C66 11020 bytes
SHA-256: 30325933a74322306688a056700f0c73f01c6eb147e560598059ec63124e7472
font_02_sfnt_off000171db.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x171DB 16148 bytes
SHA-256: 86cfde58c4245395bbcb12324660ec8b9433fe460f3ecd7dc38ce606094adde3

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