Malicious PDF — malware analysis report

Static analysis result for SHA-256 239b416db30b0361…

MALICIOUS

PDF

69.5 KB Created: 2021-01-23 23:02:16 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-04-01
MD5: b2248cf7bae392ecd0b345e7ea75ca9a SHA-1: d0bf37d47f8a31b439bc1890672736ff79d01a15 SHA-256: 239b416db30b0361427e940de65d6064648b2c503901eadec5329d4f797aa245
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://yafferge.ru/123?utm_term=vietnam+war+dbq+essay+exam+answers In PDF document text
    • https://site-1171498.mozfiles.com/files/1171498/60361751499.pdfIn PDF document text
    • http://gifozuxozud.22web.org/cars_2006_hd.pdfIn PDF document text
    • https://cdn.sqhk.co/muxigatatini/jdjejf6/planets_in_the_sky_tonight_arizona.pdfIn PDF document text
    • https://cdn.sqhk.co/koxixoneto/kreieUS/45956757468.pdfIn PDF document text
    • https://cdn.sqhk.co/vekokoze/jjjcgeU/38684129015.pdfIn PDF document text
    • https://cdn.sqhk.co/fimirexuf/hcgfZae/32025066366.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://jojudodadanu.epizy.com/jusivivej.pdfIn PDF document text
    • http://zonadomafi.rf.gd/libros_esther_hicks.pdfIn PDF document text
    • http://gizadopozi.epizy.com/maa_chintpurni_aarti.pdfIn PDF document text
    • http://livuwiga.rf.gd/31368176462.pdfIn PDF document text
    • http://nekogepi.epizy.com/dummies_guide_to_brexit.pdfIn PDF document text
    • http://tujatubaniza.epizy.com/63963715825.pdfIn PDF document text
    • http://talagamezibupip.epizy.com/auto_dialer_software_android.pdfIn PDF document text
    • https://s3.amazonaws.com/satedafadusizo/xanathar_s_guide_to_everything_cleric_spells.pdfIn PDF document text
    • https://s3.amazonaws.com/fikuvine/alien_shooter_mod_apk_latest_version.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_off0000d236.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD236 5432 bytes
SHA-256: 9c2b433272a908888a61ca52364526792a7bc31ed8ca85558996da1c585b01d8
font_01_sfnt_off0000e4b0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE4B0 10740 bytes
SHA-256: c91444ad5b2a0c279b713567c5c920010b368e58a4bcacaaa63fddde28da4061