Malicious PDF — malware analysis report

Static analysis result for SHA-256 919ec19640f71969…

MALICIOUS

PDF

73.3 KB Created: 2021-02-18 00:00:42 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-04-25
MD5: b8aa9d0c16ac3a225b277e0d9cfb024e SHA-1: 37dfa2338ecc43b8d2d326a1b8197c9fa9f564e7 SHA-256: 919ec19640f7196911702a7d109035b23db9e42e7530168850fb5527e6ace3a1
186 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
  • Small PDF contains mass external PDF link farm critical PDF_SEO_LINK_FARM
    Small PDF contains many clickable external PDF links, mostly clustered on one host. This matches generated SEO/link-farm PDF carriers used to route users into malicious or unwanted-software delivery chains, rather than a normal document citation pattern.
  • 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=me+before+you+movie+sequel PDF link annotation
    • http://bcpzonasegur4viabcp.com/gilelufarenejokitorureen08v.pdfIn PDF document text
    • https://cdn.sqhk.co/mudinaxape/2F7mly2/greatest_rock_songs_about_love.pdfIn PDF document text
    • http://usacarins.com/another_brick_in_the_wall_songjaleu.pdfIn PDF document text
    • http://digitalmedialit.com/eau_urolithiasis_guidelines_2017ll27s.pdfIn PDF document text
    • https://bulejoge.weebly.com/uploads/1/3/0/7/130775594/befokipeput.pdfIn PDF document text
    • https://zuriloteva.weebly.com/uploads/1/3/4/6/134623588/galusadafomit.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4367643/normal_600e64507cedc.pdfIn PDF document text
    • https://cdn.sqhk.co/lolajelor/xjdd2Fh/among_us_free_skins_without_human_verification.pdfIn PDF document text
    • https://cdn.sqhk.co/zasokolof/GigifjO/top_up_digicel.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4405181/normal_5fda6779995d8.pdfIn PDF document text
    • https://zupevinar.weebly.com/uploads/1/3/0/7/130739631/timigusunujew-fekelopodaveb-fanirolabor-jazalopa.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4390052/normal_5fd12c8e1d414.pdfIn PDF document text
    • http://help-copyrighteamservice.com/258113189676szij.pdfIn PDF document text
    • http://erkutungotu.com/60679931977pjmv.pdfIn PDF document text
    • https://cdn.sqhk.co/gejupajo/hh9WhfG/wasewojozen.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn 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_off0000e32e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE32E 5136 bytes
SHA-256: 02776d4685e5c800266c713afb43a764f9786a5e73ed74867e4793c00558a6ef
font_01_sfnt_off0000f4b1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF4B1 10420 bytes
SHA-256: 4c5cddefe9764161d638fadc27c559a544af1307fcbbfd0544e01fbd13a0d619