Malicious PDF — malware analysis report

Static analysis result for SHA-256 556b71e8b165459b…

MALICIOUS

PDF

71.3 KB Created: 2021-02-14 04:17:15 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-04
MD5: 760c31b6c9c33941c366552cd3724cd3 SHA-1: bde1e2636ad5abb8331f80f42836d7ab71a1fc1f SHA-256: 556b71e8b165459b027e0fea66ba02d5649a4e0e5f3d01568c6bba3cfd024145
186 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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=te+amo+mi+amor+poemas+para+mi+novia PDF link annotation
    • http://wibifowomotab.iblogger.org/mipezivupilebimopuw.pdfIn PDF document text
    • https://cdn.sqhk.co/zodozane/h8gcSpx/falling_in_reverse_lyrics.pdfIn PDF document text
    • https://cdn.sqhk.co/javijaxim/iilicjj/self_defense_sportsman_s_warehouse.pdfIn PDF document text
    • https://cdn.sqhk.co/posojuvapono/hbhd3ib/95759160916.pdfIn PDF document text
    • https://cdn.sqhk.co/toledexipez/ggjieQF/wekas.pdfIn PDF document text
    • https://cdn.sqhk.co/murafabu/dggidhi/xidutapemefididamusu.pdfIn PDF document text
    • https://vuguzakinizole.weebly.com/uploads/1/3/4/4/134493236/gebekerirudeve_wevot_wukejebukor_nesibukimemuri.pdfIn PDF document text
    • https://xajakubadom.weebly.com/uploads/1/3/0/8/130874473/kijukijobenewizib.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://lirepemewepe.rf.gd/zuniwukafelajaxoseniz.pdfIn PDF document text
    • http://norenuwidubeg.rf.gd/20482983049.pdfIn PDF document text
    • https://s3.amazonaws.com/fewifuwu/acca_f7_financial_reporting_bpp.pdfIn PDF document text
    • https://s3.amazonaws.com/lemefofutomapox/80018194913.pdfIn PDF document text
    • https://s3.amazonaws.com/tipikaxe/sap_crystal_reports_viewer_2013.pdfIn PDF document text
    • http://waraxiv.rf.gd/80988266086.pdfIn PDF document text
    • https://s3.amazonaws.com/rebomedug/9562878696.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_off0000d918.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD918 4944 bytes
SHA-256: 4c200e4ca9e9b81fb871d9da9c92b8ff7bc2ecdbf6f54ff14d63c81306b91cfc
font_01_sfnt_off0000e9d3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE9D3 11412 bytes
SHA-256: 066a76d23a306652ad8ba415cd880acb0c456b1d4fb236800bdf3b1137435a72