Malicious PDF — malware analysis report

Static analysis result for SHA-256 81c47dbe3f5f8046…

MALICIOUS

PDF

64.6 KB Created: 2021-02-26 11:49:54 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-04-25
MD5: 3cd853dd8a936bbd28121e959edcc30b SHA-1: 37e113286512a506e31afed0b8303b95ada60b6b SHA-256: 81c47dbe3f5f804645b6f0c45e65d123126f2bb742756894e7bc6e25fa9426fb
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://xezojetit.ru/award?keyword=brass+ship%2527s+engine+room+telegraph PDF link annotation
    • http://jedomagisuw.getenjoyment.net/61955820460.pdfIn PDF document text
    • https://revawowi.weebly.com/uploads/1/3/5/3/135317167/2370624.pdfIn PDF document text
    • http://dududuw.mypressonline.com/wunavaza.pdfIn PDF document text
    • https://simisodiguguvig.weebly.com/uploads/1/3/5/3/135324772/8012879.pdfIn PDF document text
    • https://cdn.sqhk.co/ramidazumiko/gjhesjj/wuxexafarilu.pdfIn PDF document text
    • https://cdn.sqhk.co/zujumatatub/Qje7ge3/rabbit_castle_hutch.pdfIn PDF document text
    • https://cdn.sqhk.co/rolileduvof/jdwUauf/masipes.pdfIn PDF document text
    • http://sawemawe.mywebcommunity.org/64626333733.pdfIn PDF document text
    • https://cdn.sqhk.co/xutujipux/1PjfNhb/pregnant_mom_baby_birth_games_caring_newborn.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4468572/normal_5ffe97b5e2c0c.pdfIn PDF document text
    • https://cdn.sqhk.co/livisade/MTvhgVn/rc-_airsim_rc_model_airplane_flight_sim.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4374533/normal_6032a5035bf51.pdfIn PDF document text
    • http://zonerokemub.getenjoyment.net/onkyo_tx-nr686_reset.pdfIn PDF document text
    • https://vomedizi.weebly.com/uploads/1/3/5/3/135312409/wikomovage_bawexolinasovu_zajorafe.pdfIn PDF document text
    • https://jibunomo.weebly.com/uploads/1/3/5/3/135348462/5974117.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://nukilaba.myartsonline.com/how_come_my_dryer_wont_dry.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_off0000c1cc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC1CC 5316 bytes
SHA-256: abd7becfeb7fc0d8963087c80631d19eac1ade702aa8f316a45d5b189486724b
font_01_sfnt_off0000d3bc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD3BC 9896 bytes
SHA-256: bbca710a1ef4df6c33b3e232fda3082c8da44f43eff84e7d4c34a2a3cb1dff46