Malicious PDF — malware analysis report

Static analysis result for SHA-256 f2ecfa4c5f9e31c2…

MALICIOUS

PDF

77.2 KB Created: 2021-03-27 18:22:27 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-07-02
MD5: b331f5071d6e5930c2b60fbb810389f3 SHA-1: e875269c381dd62b273ccd0b69e515ba09a3e465 SHA-256: f2ecfa4c5f9e31c203d2bdd6d1dc10016348eb8e2bd0ea35cfa40d48c607d673
126 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript T1203 Exploitation for Client Execution

The PDF was flagged by multiple heuristics, including a high-confidence ML classifier and ClamAV, indicating malicious content. The presence of numerous external URIs and the 'PDF_SEO_DISPOSABLE_LINK_FARM' heuristic suggest the document is designed to redirect users to potentially malicious websites. The document body, though heavily obfuscated, contains metadata related to its creation, which does not detract from the malicious indicators.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9993

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://zajinet.ru/wix?keyword=the+little+mermaid+cast+2020+trailer PDF link annotation
    • https://static.s123-cdn-static.com/uploads/4487916/normal_5fcc8d3e9cd42.pdfIn PDF document text
    • https://cdn.sqhk.co/foxoxaze/C6jiPja/lemowavizewebibugapixaxe.pdfIn PDF document text
    • http://dorutote.scienceontheweb.net/surgical_anatomy_of_abdominal_wall.pdfIn PDF document text
    • http://gebevojika.mygamesonline.org/jizijusadatawekepazigatav.pdfIn PDF document text
    • http://zutatowatipo.mywebcommunity.org/bissell_big_green_professional_carpet_cleaner_machine_rental.pdfIn PDF document text
    • https://cdn.sqhk.co/fezajuwu/icoihnq/sivesekemubenawu.pdfIn PDF document text
    • http://disupata.iblogger.org/student_admission_number_format.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4451545/normal_6046b5d97c7f2.pdfIn PDF document text
    • https://cdn.sqhk.co/leporolino/QgdHic5/93657055503.pdfIn PDF document text
    • http://vurovolapoza.mygamesonline.org/vevebezipisekifagiwen.pdfIn PDF document text
    • https://cdn.sqhk.co/tekixonef/yierzjh/faxasepatogevizorobux.pdfIn PDF document text
    • https://cdn.sqhk.co/jupujezaxa/hajfNii/80812214008.pdfIn PDF document text
    • https://cdn.sqhk.co/jomawutid/ijhaHea/18072820002.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4409610/normal_600f2c760a6bc.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://fedukuto.epizy.com/32894642377.pdfIn PDF document text
    • http://lajawul.epizy.com/33325825473.pdfIn PDF document text
    • https://s3.amazonaws.com/vajefam/54660433503.pdfIn PDF document text
    • https://s3.amazonaws.com/fedojigudaj/resume_letter_file.pdfIn PDF document text
    • http://modejabopeb.epizy.com/41995232263.pdfIn PDF document text
    • https://s3.amazonaws.com/sabobenuwe/sociology_of_education_journal.pdfIn PDF document text
    • https://s3.amazonaws.com/zakunafu/cong_dung_thuoc_metformin_stada_850mg.pdfIn PDF document text
    • http://kafalemanam.epizy.com/islamic_books_in_urdu_free_download_deoband.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_off0000f1fd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF1FD 5404 bytes
SHA-256: 968a34f62c3184b3aea863f2390b66df0b7e30625ac27f3845382f5a9a16061a
font_01_sfnt_off0001042a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1042A 10332 bytes
SHA-256: 0a6a68f024d1cc2cba33f8cb5066a8de2549e3d259af64ddaaa8222cb9dee5ea

Open this report in the interactive analyzer, or submit your own file for analysis.