Malicious PDF — malware analysis report

Static analysis result for SHA-256 cfb7e5248152f60a…

MALICIOUS

PDF

79.3 KB Created: 2021-02-27 22:43:31 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-10
MD5: 4941456eb641fbb294efddbc6109f6f4 SHA-1: f06d9ca2e7b14c12637f577fa41052c07f046db5 SHA-256: cfb7e5248152f60af6ab48e22c2c12e8b6e0d56b60911aaa581445239c2b358d
166 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
  • Image-heavy PDF with invisible link to suspicious domain high PDF_SUSPICIOUS_LINK_LURE
    PDF is a small image-heavy lure with invisible link annotations that send the user to a suspicious high-risk-domain URI. This matches credential-phishing carriers where the visible document is only a prompt and the real collection flow happens on the linked website.
  • 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/wb?keyword=how%20to%20change%20the%20ring%20doorbell%20wifi PDF link annotation
    • http://miromawetibikew.mywebcommunity.org/can_a_google_voice_number_be_traced_by_police.pdfIn PDF document text
    • http://streichpack.online/sodujukosbyxh.pdfIn PDF document text
    • http://nafarami.medianewsonline.com/38013594309.pdfIn PDF document text
    • http://ins.expert/final_fantasy_14_xbox_one_gameplay1bdse.pdfIn PDF document text
    • http://teksalle.xyz/bona_fide_request_formsr3jk.pdfIn PDF document text
    • http://robugipunebib.mygamesonline.org/how_to_adjust_singer_4411_sewing_machine.pdfIn PDF document text
    • http://clientesdkb.com/japileb5kifo.pdfIn PDF document text
    • http://nikaold.site/gozarkorc2.pdfIn PDF document text
    • http://gufutaca3.xyz/74300217595abv81.pdfIn PDF document text
    • http://world-wildshop.com/42914411891a0br7.pdfIn PDF document text
    • http://securitycheckingbrowservkcom.xyz/neiva_mara_tv_twitter5ocbu.pdfIn PDF document text
    • http://temppicture.xyz/35887893986x79ip.pdfIn PDF document text
    • http://lenudes.com/35406966287ygcu0.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://kajufikuxididon.rf.gd/10461517441.pdfIn PDF document text
    • https://s3.amazonaws.com/werowibovezoje/what_is_the_life_of_a_nuclear_power_plant.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_off0000fa36.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFA36 5300 bytes
SHA-256: 7c073f9b5b9fd7b0a47550b4e44e28a5a552878a2f33aedae7ad73e6aa21abe5
font_01_sfnt_off00010c48.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10C48 10580 bytes
SHA-256: aa147157ff76505d4f2d67a4ae07c451a84718323d9815cfb60019b217406604