Malicious PDF — malware analysis report

Static analysis result for SHA-256 0d6edf181f5750a6…

MALICIOUS

PDF

68.3 KB Created: 2021-02-26 04:42:37 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-23
MD5: 2fc247fdd03b3c10be2b3a789b8399ee SHA-1: c4a6a17b776ba1809caa25266b23cc5aa3581796 SHA-256: 0d6edf181f5750a6bfc6b794f764565a60a648c05452fdea96446a60af2eab31
184 Risk Score

Malware Insights

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

The PDF contains numerous embedded links, with several pointing to known malicious redirectors and disposable hosting. The ML classifier and ClamAV detection strongly indicate malicious intent, likely phishing or malware distribution. Although no scripts were explicitly extracted, the PDF structure and embedded URLs suggest an attempt to redirect the user to malicious content, potentially for credential harvesting or further payload delivery.

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
  • 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://crophysi.ru/wb?keyword=monster%20hunter%20illustrations%202%20hardcover In PDF document text
    • http://kamikofonem.mygamesonline.org/jowuwe.pdfIn PDF document text
    • http://fanisore.sportsontheweb.net/66898773915.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4479942/normal_5fc904faf34ee.pdfIn PDF document text
    • http://fasekafalig.scienceontheweb.net/78383070096.pdfIn PDF document text
    • http://zuropofi.22web.org/vanity_fair_bras_clearance.pdfIn PDF document text
    • http://tijudozi.scienceontheweb.net/how_to_bypass_alarm_zone_adt.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4414501/normal_60378cedf3717.pdfIn PDF document text
    • http://nokasosozigof.mypressonline.com/93841424230.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4392854/normal_5ffffe0b61521.pdfIn PDF document text
    • http://nageramuvepom.mywebcommunity.org/89343330567.pdfIn PDF document text
    • http://wedipum.mygamesonline.org/the_law_of_the_garbage_truck_book.pdfIn PDF document text
    • http://lofajemami.sportsontheweb.net/what_are_the_specials_at_subway_today.pdfIn PDF document text
    • http://bomaduworofa.medianewsonline.com/52169131437.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://bavotuvezomevi.myartsonline.com/radawevexinak.pdfIn PDF document text
    • https://s3.amazonaws.com/desenaz/lol_tft_cheat_sheet_9._14.pdfIn PDF document text
    • http://jevoneloz.epizy.com/rilesevasanofutaka.pdfIn PDF document text
    • http://jaxirelogalitis.epizy.com/atletico_de_madrid_uniforme_negro.pdfIn PDF document text
    • http://vatamutotomo.epizy.com/jexabavunirujunal.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_off0000cd3a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCD3A 5224 bytes
SHA-256: 4c8e2eaf6428ce5bbda06d13c0d9c6e19eec03fc52c636fa40c5df4c7f4a89fa
font_01_sfnt_off0000df0b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDF0B 10824 bytes
SHA-256: a5211330a0aab88fee23dc18623569f752fa5acc586f0fd797d3ab6d58a37558

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