Malicious PDF — malware analysis report

Static analysis result for SHA-256 614f15a157fa1e15…

MALICIOUS

PDF

78.7 KB Created: 2021-03-31 02:16:58 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-08-20
MD5: d184c2d1c77a51e6c38b78d5d73171fc SHA-1: b186476071de56bd011a3f8367d6f99489ba17f0 SHA-256: 614f15a157fa1e1525d2bd13130f932efbf0b204bbadd51467048a9c3703f20a
126 Risk Score

Malware Insights

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

This PDF file was flagged as malicious by ML classifiers and ClamAV, indicating a high likelihood of malicious intent. The heuristics indicate it functions as a link farm, directing users to multiple external websites, including one with a suspicious URL related to 'medical abbreviations worksheet answers'. While no scripts were explicitly extracted, the PDF structure and embedded URLs suggest it is designed to redirect users to potentially malicious content, likely for phishing or malware distribution.

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://dugedepap.ru/wix?keyword=working+with+medical+abbreviations+worksheet+answers PDF link annotation
    • https://serarabasujuz.weebly.com/uploads/1/3/1/6/131606617/1957cd447134.pdfIn PDF document text
    • https://cdn.sqhk.co/tipefimex/FPhchcl/spiral_staircase_for_sale_cape_town.pdfIn PDF document text
    • http://pivolirarorip.mypressonline.com/the_hard_truth_about_business_model_innovation.pdfIn PDF document text
    • http://zolekumosex.iblogger.org/how_to_use_a_zojirushi_rice_cooker_instructions.pdfIn PDF document text
    • https://taxezuwijukiwum.weebly.com/uploads/1/3/1/6/131606901/4032365.pdfIn PDF document text
    • http://kind-insta.site/lebezunenimikowaochq.pdfIn PDF document text
    • https://cdn.sqhk.co/xotakuzazuf/gdjhgf0/total_battle_tactical_strategy_mod_apk.pdfIn PDF document text
    • https://xazonidunigi.weebly.com/uploads/1/3/4/5/134590253/9892092.pdfIn PDF document text
    • https://cdn.sqhk.co/padirazemi/difxoih/jomopuro.pdfIn PDF document text
    • http://nosinoski.shop/sofewumezagadelipijugs08g.pdfIn PDF document text
    • https://cdn.sqhk.co/duwenaxiseve/g7ifBbu/into_mirror_paid_apk.pdfIn PDF document text
    • http://olivamebel.com/rekifunonogetozokosufoo2d.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://f0198b83-f3fe-41b4-8315-bacd7eabb238.filesusr.com/ugd/2b3f46_9317932d763b4acdba19c4da487f7539.pdf?index=trueIn PDF document text
    • http://xerifuxedu.rf.gd/22133471288.pdfIn PDF document text
    • http://nugagopi.epizy.com/australia_outline_map.pdfIn PDF document text
    • http://ruronegiseko.atwebpages.com/crits_apocryphes_chrtiens.pdfIn PDF document text
    • http://vajipiposugeto.rf.gd/density_questions_and_answers.pdfIn PDF document text
    • https://b1fdf235-84a1-4479-ba44-7fc4a4f983d7.filesusr.com/ugd/afcd87_11764ff4b65a4b599ee89b9a2b3e6616.pdf?index=trueIn PDF document text
    • http://sonowodiguvab.epizy.com/eclipse_c_format_code.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_off0000f2c2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF2C2 5720 bytes
SHA-256: 6abae0d5bc79cace1ea5d2b5381266d4521bf03bf216dd0215797e984c4c5c25
font_01_sfnt_off00010627.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10627 11564 bytes
SHA-256: 8d82f92ee920ada4cfd5daaa424beca0c49d101ea80b91368827e4fdc7202a55

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