Malicious PDF — malware analysis report

Static analysis result for SHA-256 62796f7a9a5b7287…

MALICIOUS

PDF

94.9 KB Created: 2021-03-14 23:17:01 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-21
MD5: b09fe9b83553d770aaf24bfd0b84d9b2 SHA-1: 9e65f5b4e8fbb79cfbe3404c236c776c7459051c SHA-256: 62796f7a9a5b72878ac93e80c3783ca8889de61118ad840fefce3e4d381df317
184 Risk Score

Malware Insights

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

The PDF contains numerous embedded URLs pointing to disposable domains, a common tactic for link farms and phishing. The heuristic 'PDF_MALICIOUS_REDIRECTOR_LINK' specifically flags a URL leading to known malicious infrastructure. While no scripts were extracted, the structure and URL patterns strongly suggest a malicious intent to redirect users to harmful content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

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
  • PDF links to known malicious redirector infrastructure critical PDF_MALICIOUS_REDIRECTOR_LINK
    PDF contains a clickable URI to redirector infrastructure used by a known malicious PDF SEO/adware delivery campaign. These documents typically rely on user interaction and redirect chains rather than a PDF parser vulnerability.
  • 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.
  • 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://dafemum.ru/wix?keyword=dispositivos+de+red+lan In PDF document text
    • http://montana-media.com/what_are_good_topics_for_a_research_proposalq7oe6.pdfIn PDF document text
    • http://raisinslabs.club/lapakemupefirodevanqvaky.pdfIn PDF document text
    • http://pusejukaxotip.22web.org/wateregalegemidikewejur.pdfIn PDF document text
    • http://copyright-notice-ig.com/buku_retorika11djx.pdfIn PDF document text
    • http://afracheat7.xyz/organic_chemistry_acs_study_guide9qxon.pdfIn PDF document text
    • http://gapojigewe.22web.org/potegafob.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4489988/normal_5fc6286929243.pdfIn PDF document text
    • https://cdn.sqhk.co/jumibizede/gcihkps/71541217019.pdfIn PDF document text
    • http://wizatone.iblogger.org/electricity_and_magnetism_worksheet_part_1.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4482617/normal_5fd085956e9cd.pdfIn PDF document text
    • https://cdn.sqhk.co/gitesafuwu/WidMtjf/pugak.pdfIn PDF document text
    • http://linza.media/enlever_mauvais_oeil_avec_oeufyjbcl.pdfIn PDF document text
    • https://cdn.sqhk.co/wemegofuk/xjehnih/electronic_components_sourcing_database.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://vowaxuf.rf.gd/cbs_sports_injury_report_nba.pdfIn PDF document text
    • http://kalumeli.rf.gd/tumolobemibof.pdfIn PDF document text
    • http://jakokukomi.epizy.com/stoner_john_williams_goodreads.pdfIn PDF document text
    • http://zagaturatok.epizy.com/command_and_conquer_generals_apk.pdfIn PDF document text
    • http://taxisariwoboduz.epizy.com/rewizo.pdfIn PDF document text
    • http://gawowupakifofe.rf.gd/problem_and_solution_text_structure_slideshare.pdfIn PDF document text
    • http://jodamedorofile.epizy.com/xemuvejuvafe.pdfIn PDF document text
    • http://manajotoxu.epizy.com/integrated_chinese_level_2_part_1_teachers_handbook.pdfIn PDF document text
    • http://rasinizewubegeg.epizy.com/behind_closed_doors.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_off000136a4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x136A4 5012 bytes
SHA-256: 8df24c024b622a7317775cd5267d260c4e35c1ed7450624ba1e8c620407ce871
font_01_sfnt_off000147c7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x147C7 11860 bytes
SHA-256: 764934ba9fc1492533eb80392a733475890c160732606b9395d3d1bb875a5e31

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