Malicious PDF — malware analysis report

Static analysis result for SHA-256 1b95c7bc903a182d…

MALICIOUS

PDF

66.2 KB Created: 2021-02-25 07:07:17 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-04-10
MD5: f444676ead1f7c2944dac6f28901afe7 SHA-1: 898eecd065a4b0b228704d0b0d39b1a97a963951 SHA-256: 1b95c7bc903a182d3b7bc171b5f91af467c0f4ea4ef793a1a743b1dcf8a4e22c
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://maypoin.ru/award?keyword=readynas+nv%252B+v2+factory+reset PDF link annotation
    • https://cdn.sqhk.co/mapetidul/jejhhf8/mofuvimividepibo.pdfIn PDF document text
    • http://securityverifiedservices.com/how_to_put_my_delta_crib_together67cma.pdfIn PDF document text
    • https://manumuxalobo.weebly.com/uploads/1/3/5/3/135387638/mesewiratubet.pdfIn PDF document text
    • http://straponartist.com/93441175148e39x3.pdfIn PDF document text
    • https://cdn.sqhk.co/nobixapo/zhbghAU/82326991631.pdfIn PDF document text
    • https://cdn.sqhk.co/zujarepifej/cgija7H/bubonixogefonifasebug.pdfIn PDF document text
    • https://budasanufewe.weebly.com/uploads/1/3/5/3/135323580/momolej.pdfIn PDF document text
    • https://cdn.sqhk.co/tajugajobib/jhghQig/piano_tiles_magic_music_tiles_games_apk.pdfIn PDF document text
    • https://cdn.sqhk.co/toledexipez/fojji1A/zunipezugixeladateravax.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4420238/normal_601afd555b4c9.pdfIn PDF document text
    • http://the-job.ru/stalker_shadow_of_chernobyl_apks7mhc.pdfIn PDF document text
    • http://zerudomafiko.iblogger.org/xoresevizuxute.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/veraxawewib/59731818217.pdfIn PDF document text
    • https://s3.amazonaws.com/suzixegazunow/13622444416.pdfIn PDF document text
    • https://s3.amazonaws.com/fajeloninesitel/catalogos_cfdi_3._3_sat.pdfIn PDF document text
    • http://mebexadesojixip.rf.gd/57116471739.pdfIn PDF document text
    • http://jawikaginixuxuz.rf.gd/74220976890.pdfIn PDF document text
    • http://xogonat.epizy.com/tumum.pdfIn PDF document text
    • https://kb.netgear.com/29760/How-do-I-recover-a-lostIn 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_off0000c7fc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC7FC 5284 bytes
SHA-256: 1ac2ae1e641201774a245244404705a88552522dc0bd1e9f82b62a263463a9ac
font_01_sfnt_off0000da1c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDA1C 9932 bytes
SHA-256: 9b2f20add74b544f87ddb4dae204dc3c252938f05aa6eecb37983256da314e86