Malicious PDF — malware analysis report

Static analysis result for SHA-256 88b929f5112ae150…

MALICIOUS

PDF

77.4 KB Created: 2021-03-02 13:11:55 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-03
MD5: 86c6c4d1deee05f21fec4ea283e96739 SHA-1: d9b5ca0ec0fa1d72ac28ac48fd667508ae17d540 SHA-256: 88b929f5112ae150c717d5cce90e8b2f728ad602ca057c66c0cf669d2470be7f
126 Risk Score

Malware Insights

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

This PDF file was flagged by multiple heuristics and a machine learning classifier as malicious, specifically identified as a phishing trojan by ClamAV. It contains numerous embedded URLs, many of which are part of a link farm hosted on disposable domains, suggesting an attempt to redirect users to malicious content. The document body, though heavily obfuscated, appears to be a lure related to 'pretty little liars cast season 4 episode 14' to entice clicks on these external links.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://golowaki.ru/strik?utm_term=pretty+little+liars+cast+season+4+episode+14 PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4495402/normal_600ef21b8a6e5.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4446036/normal_5fd0fd95e2de6.pdfIn PDF document text
    • http://mebets.xyz/lifamulobijodixuduwevewixdzc7t.pdfIn PDF document text
    • http://cmbespaceclient.xyz/buribomagebotivubuwazaucsx4.pdfIn PDF document text
    • http://it50disconto.info/777809041463kkh5.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4370762/normal_5fe3b51a74575.pdfIn PDF document text
    • http://technodom11.com/podesibeduzolezevageselx0sl.pdfIn PDF document text
    • https://lasomuvexovip.weebly.com/uploads/1/3/0/8/130813571/fogizole.pdfIn PDF document text
    • http://justamorem.com/776054147307505b.pdfIn PDF document text
    • http://jadebey-x.com/bully_2_game_for_pcrbold.pdfIn PDF document text
    • https://tezijiso.weebly.com/uploads/1/3/4/6/134690371/9255226.pdfIn PDF document text
    • http://shoppermarket.online/how_to_use_cuisinart_griddler_gourmeta3mun.pdfIn PDF document text
    • http://kikababono.mywebcommunity.org/williams_wall_heater_gas_valve.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4487423/normal_600d493aa1737.pdfIn PDF document text
    • http://tosety.xyz/affiliate_marketing_guidejd1vp.pdfIn PDF document text
    • https://dukupifit.weebly.com/uploads/1/3/0/7/130775427/707a3ed4c89f.pdfIn PDF document text
    • http://nigoguno.scienceontheweb.net/petition_for_grant_of_letters_of_administration_pa.pdfIn PDF document text
    • http://giwitijudaleka.mygamesonline.org/metodologia_de_la_investigacion_sampieri_4ta_edicion.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4462727/normal_5fc85245d9329.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4418786/normal_5ff9a6a911031.pdfIn PDF document text
    • http://yoga-fitness.space/441075043446tv1c.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn 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_off0000f16c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF16C 5312 bytes
SHA-256: af38703d2f07bee91e1e9050611ee72bccd78e032a11767bac03bf6bbebf4e3f
font_01_sfnt_off0001039a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1039A 10652 bytes
SHA-256: fe65fe2be33f138fe0bb78ba02cf2218a36dc7e1ade998c3b744f94b68a7c5f4

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