Malicious PDF — malware analysis report

Static analysis result for SHA-256 85832ebed3e8c81d…

MALICIOUS

PDF

71.5 KB Created: 2021-02-28 12:41:45 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-16
MD5: 1eb1c52e8ee600dc2f407c7d8462cb89 SHA-1: df3295c6c39bb6324969c67b4de9b5b4f9ccb116 SHA-256: 85832ebed3e8c81d79e8161625a7d6076975e02b5b8d2710dd28316ad2ed5a77
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 phishing or trojan payload. The document body, though heavily obfuscated, contains a URL that appears to be a lure for users searching for information on a 'Hamilton Beach roaster'. The presence of external URIs and link farm heuristics further supports a malicious intent to redirect users to potentially harmful sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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://pelibifir.ru/strik?utm_term=how+do+you+use+a+hamilton+beach+roaster PDF link annotation
    • http://topifurolezup.iblogger.org/99272264428.pdfIn PDF document text
    • http://rafewasugajeze.22web.org/what_does_the_name_juan_mean_in_english.pdfIn PDF document text
    • http://gevazuvunurodum.22web.org/zozuni.pdfIn PDF document text
    • http://ita-talia.fun/dell_inspiron_n5010_ram_frequencyxbpyh.pdfIn PDF document text
    • https://xapowukugo.weebly.com/uploads/1/3/4/7/134702937/6319503.pdfIn PDF document text
    • http://sekasululaba.iblogger.org/wojinesiseginelizizimode.pdfIn PDF document text
    • http://kokilubowo.22web.org/30893648305.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://xaxotatizomeno.rf.gd/answer_interview_questions_with_star.pdfIn PDF document text
    • http://weguxoxuwaxa.epizy.com/kerivokatafigurujikoki.pdfIn PDF document text
    • http://fevejalamozek.epizy.com/craftsman_20_chainsaw_review.pdfIn PDF document text
    • https://s3.amazonaws.com/tunenijexe/evolutionary_arms_race_video_worksheet_answers.pdfIn PDF document text
    • http://gezupipul.rf.gd/a_noite_dos_mortos_vivos_livro.pdfIn PDF document text
    • https://s3.amazonaws.com/lofese/brushite_stone_formation.pdfIn PDF document text
    • http://kenugaderagof.epizy.com/61296930878.pdfIn PDF document text
    • http://rojepubaxogo.epizy.com/ihg_concerto_manual.pdfIn PDF document text
    • http://gebejofokim.rf.gd/tivekusikisipuzavo.pdfIn PDF document text
    • http://papawipowujujed.rf.gd/ninavaz.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_off0000d9fb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD9FB 5472 bytes
SHA-256: 96684fd57f897a148a81dd4efe651836beaa4c955fb98ff3929045ab6ae349cf
font_01_sfnt_off0000ec80.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEC80 10764 bytes
SHA-256: 0b312f9ee7da71c8d84e16d0e940ede0248169ff778839d8e886a6f70afcbebc

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