Malicious PDF — malware analysis report

Static analysis result for SHA-256 4f879b589977fdc5…

MALICIOUS

PDF

71.4 KB Created: 2021-02-10 14:54:50 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-04-25
MD5: c7fefe50e9cd1d185d7d62c3aa406fad SHA-1: 3db42d3d01e7eb495727aebe2a57a2ce173ee2a5 SHA-256: 4f879b589977fdc5847468785c707805c724b056eb9516188649861859efdf64
166 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • Image-heavy PDF with invisible link to suspicious domain high PDF_SUSPICIOUS_LINK_LURE
    PDF is a small image-heavy lure with invisible link annotations that send the user to a suspicious high-risk-domain URI. This matches credential-phishing carriers where the visible document is only a prompt and the real collection flow happens on the linked website.
  • 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://bologen.ru/123?utm_term=body+rider+dual+trainer+foot+pedal PDF link annotation
    • http://nicechange.space/temple_of_aminishi_guide_soloqxgq6.pdfIn PDF document text
    • http://excschool.ru/vocabulary_words_for_high_schooln1ax8.pdfIn PDF document text
    • http://mon-compte-cmb.best/33490555253u4011.pdfIn PDF document text
    • https://cdn.sqhk.co/mobirewin/ihjB1Dz/rizafop.pdfIn PDF document text
    • http://ig-supportcenter.xyz/effective_modular_design_in_software_engineeringejbu8.pdfIn PDF document text
    • http://baykamif.space/lenovo_legion_y520_driverw9vq5.pdfIn PDF document text
    • https://cdn.sqhk.co/fugolamudara/gjifheA/red_rose_wallpaper_hd_3d.pdfIn PDF document text
    • https://cdn.sqhk.co/pibexezases/f99gOgd/puxokazexuluveguseva.pdfIn PDF document text
    • http://teachersaid.fun/79641144604uwu6m.pdfIn PDF document text
    • http://toteganutiv.66ghz.com/angular_formcontrol_checkbox_array.pdfIn PDF document text
    • http://buyervannakupitvsem.xyz/sawijan74hhj.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://jufamupubo.epizy.com/tajetenidetukurulobobemax.pdfIn PDF document text
    • http://domirewuzi.epizy.com/aeropex_aftershokz_manual.pdfIn PDF document text
    • http://zasuridedowimam.rf.gd/6023785506.pdfIn PDF document text
    • http://vagilamiporaw.epizy.com/97507836523.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_off0000da6a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDA6A 5008 bytes
SHA-256: f40706274f28e9e18569a6b3abf7f171a1cd7fc72df0d9545dcd115e8e530089
font_01_sfnt_off0000eb8f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEB8F 10936 bytes
SHA-256: 4ddc2fc848dc65c6b763d16c41a868ec9ae6944a7c07e3756bb94ca895d74b2a