Malicious PDF — malware analysis report

Static analysis result for SHA-256 782dc6d5af233cbe…

MALICIOUS

PDF

78.0 KB Created: 2021-01-25 19:34:05 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-23
MD5: cc0136d57cef21b075007bfad0ce8c66 SHA-1: 8c162eb0df9fb06aec123bb300e4eac53ba257c6 SHA-256: 782dc6d5af233cbee3b455c932c883ac331a1da08508f732612f03ce993c55cb
126 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 phishing or malware distribution. The ML classifier and ClamAV detection strongly indicate malicious intent. While no scripts were directly extracted, the PDF structure and numerous external links suggest it's designed to redirect users to malicious content, likely a phishing page or a download site.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9994

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://seumenha.ru/aws?utm_term=brahmotsavam+songs++naa PDF link annotation
    • http://batmbatm.ru/lopugulezolefupdd3w7.pdfIn PDF document text
    • http://helpcopyright-service.com/guilty_pleasure_lyrics_elton_john10vl4.pdfIn PDF document text
    • http://khareedforosh.com/rogupopirojuferafexapulfyrcs.pdfIn PDF document text
    • http://laura-egorova.ru/foterikivenofexebwrn7.pdfIn PDF document text
    • http://topstudy.fun/973313768857g1j2.pdfIn PDF document text
    • http://eyebrowthreadingdallastx.com/doubledown_casino_vegas_slots_free_chipshgal7.pdfIn PDF document text
    • http://probmake12.xyz/free_stress_balls_uk4ktce.pdfIn PDF document text
    • http://shoop-fp.ru/mimusojelisalubireg169z.pdfIn PDF document text
    • http://btsworld.org/soap_ingredients_for_sensitive_skinzmxi3.pdfIn PDF document text
    • http://idealicacolumbia.site/zodasumusebimopevefp1vyp.pdfIn PDF document text
    • http://armada.technology/50254963409z9faa.pdfIn PDF document text
    • http://appletopshop.ru/52861783950z1pef.pdfIn PDF document text
    • http://pink-echo.club/148728466873qcmd.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://lozekav.epizy.com/ayesha_jalal_articles.pdfIn PDF document text
    • http://mobuloremade.rf.gd/nagisanozipe.pdfIn PDF document text
    • http://viganoxoloni.rf.gd/2019_application_dhet_bursary_form.pdfIn PDF document text
    • http://jadupapobixe.epizy.com/sexawowifowanabaloba.pdfIn PDF document text
    • http://magikid.epizy.com/51526466452.pdfIn PDF document text
    • http://xujiwusa.epizy.com/55757971087.pdfIn PDF document text
    • http://zugujegezamuto.epizy.com/watch_dogs_2_in_style_trophy_guide.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e392.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE392 4904 bytes
SHA-256: 93823582148f4ab6f3ece0eebfd27062f2696fbd55f62ebcde16c162d425f829
font_01_sfnt_off0000f4ce.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF4CE 5176 bytes
SHA-256: 7c9ad4c5197e7089d6bb7707483d5393da9cf3892076cde4153508f09d7cec5a
font_02_sfnt_off00010644.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10644 10852 bytes
SHA-256: 5f3280a77977d6b5db8190d401b552d78b9042551af1d0485324452586a2f56d

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