Malicious PDF — malware analysis report

Static analysis result for SHA-256 a902c009897c5323…

MALICIOUS

PDF

71.1 KB Created: 2021-03-04 05:37:58 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-04
MD5: eb776ced48443d17821c8e21d599bf09 SHA-1: 4dbfa8dae658809bddc96bde2ca95ca5329d98cd SHA-256: a902c009897c532322bd7241549ddd05e910b6d9c4eaa7fe9842d77aa7801452
184 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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/wix?keyword=monument+mountain+regional+high+school+calendar In PDF document text
    • https://cdn-cms.f-static.net/uploads/4371553/normal_60355c01243a0.pdfIn PDF document text
    • https://nudabixe.weebly.com/uploads/1/3/4/5/134505388/3039926.pdfIn PDF document text
    • http://nafarami.medianewsonline.com/69021645162.pdfIn PDF document text
    • http://kojazunupetip.mygamesonline.org/the_most_luminous_stars_are.pdfIn PDF document text
    • http://gajonedorebuko.mywebcommunity.org/meeting_room_booking_software_reviews.pdfIn PDF document text
    • http://sijubuwejipamun.mywebcommunity.org/90112289295.pdfIn PDF document text
    • https://rewesiriwo.weebly.com/uploads/1/3/4/3/134318955/guwetekogafeno.pdfIn PDF document text
    • https://larekupexog.weebly.com/uploads/1/3/4/8/134884129/sukejazefaboru_xosuz_lojileto.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://zudupaxub.myartsonline.com/lizutupuvekobut.pdfIn PDF document text
    • http://jakefubenuwep.epizy.com/41410395037.pdfIn PDF document text
    • http://pugetuwozijeso.rf.gd/biafra_war_songs.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_off0000cc9c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCC9C 5356 bytes
SHA-256: 50f1b39bdeb42cf1f710f68129d5c94a1d97184143079efd7f4da75b7995ae9e
font_01_sfnt_off0000deaa.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDEAA 15568 bytes
SHA-256: d21f9d968532df44fc9397ea4216130741f8e7212628fc2456195bb9a2a7307f