Malicious PDF — malware analysis report

Static analysis result for SHA-256 8ca0573c1b160c22…

MALICIOUS

PDF

90.8 KB Created: 2021-03-04 01:08:16 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-10
MD5: 10dc615a0b0fe79caa1a41eec144b2bc SHA-1: 1f0d96953efae3f6bf598fcae0d04fe72861bc18 SHA-256: 8ca0573c1b160c22b7e1a8e84154009c51188994ad77b2c503c2ccb2c3fab10b
126 Risk Score

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
  • 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://baarspo.ru/wb?keyword=does%20thinkorswim%20have%20a%20scanner PDF link annotation
    • http://ashotik.space/hold_on_we_re_going_home_original3bnzb.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4372101/normal_600b726d1edff.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4371790/normal_6006289dc20ee.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4414332/normal_603a0d6e76a07.pdfIn PDF document text
    • http://gufutaca1.xyz/446824839341kdym.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4495696/normal_60217985e7f86.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4494889/normal_5ffcc36f334e0.pdfIn PDF document text
    • http://nesobaka7.xyz/unblocked_games_77_strike_force_kitty7w1eg.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4368503/normal_6007fda04fb6a.pdfIn PDF document text
    • http://rm-swis-mine.com/reinforced_concrete_design_spreadsheet_free_download93ep9.pdfIn PDF document text
    • https://cdn.sqhk.co/sovokeduseb/jgCyHja/good_old_dungeon_tips.pdfIn PDF document text
    • http://ig-verifiedsbadge.com/wudukujojerzw.pdfIn PDF document text
    • http://sdl-trade.com/58933279353tm5kv.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/jasadavebaga/bennett_movement.pdfIn PDF document text
    • https://s3.amazonaws.com/fuwenoxuzasila/durham_accident_reporting_center.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_off00012847.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12847 5220 bytes
SHA-256: 7a0e7bae654aae68b81210d57f6649435ce9645050e9058ff43249ce01c0859a
font_01_sfnt_off000139fa.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x139FA 10680 bytes
SHA-256: ae28bc95725367f31c3ca2ddc983fd88d9597d1113b51d0efdbc226e26b6a5ae