Malicious PDF — malware analysis report

Static analysis result for SHA-256 f915a3423e6cd36e…

MALICIOUS

PDF

65.3 KB Created: 2021-02-24 11:44:20 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-04-25
MD5: 62a4f1565068ae5d68c057970413f4b9 SHA-1: b616fe7a08ba5d12cc6e396bfe901f33acc20d57 SHA-256: f915a3423e6cd36e17abae71de55be2cc1e7b3a5400cdf58f87cf61dba13dae0
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=how+to+make+a+simple+machine PDF link annotation
    • https://letunaxure.weebly.com/uploads/1/3/1/3/131383761/kipidozuvozumutilag.pdfIn PDF document text
    • http://wurijudopala.22web.org/poxedabademeraganazasuv.pdfIn PDF document text
    • https://sosakenokez.weebly.com/uploads/1/3/4/4/134445245/e144ac50f531772.pdfIn PDF document text
    • https://totaduwuvib.weebly.com/uploads/1/3/0/9/130969262/866f48caf51ee54.pdfIn PDF document text
    • http://riniwovefaraw.22web.org/tavim.pdfIn PDF document text
    • https://cdn.sqhk.co/rapovixovuti/rjapig0/zalonegofixaxovene.pdfIn PDF document text
    • https://molukubiluvu.weebly.com/uploads/1/3/1/4/131453067/regapoto.pdfIn PDF document text
    • http://mukijekupivi.22web.org/43912316080.pdfIn PDF document text
    • https://cdn.sqhk.co/gonolesuzam/iihd2jj/72324715548.pdfIn PDF document text
    • https://cdn.sqhk.co/busoleva/IDieEje/zombie_shooter_dead_city_game_download.pdfIn PDF document text
    • https://luvagifewu.weebly.com/uploads/1/3/4/7/134766249/ccbcd365.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://jerovewoxisabu.epizy.com/ariens_24_inch_snow_blower_owners_manual.pdfIn PDF document text
    • http://gagemusogigubew.epizy.com/carson_crying_format.pdfIn PDF document text
    • http://liwivudelaje.epizy.com/why_is_my_eye_blood_red_in_the_corner.pdfIn PDF document text
    • http://lavususixufera.rf.gd/brother_hl-2280dw_toner_refill.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_off0000c517.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC517 5192 bytes
SHA-256: 5c76be06bdcfad697a7d291d244a0af74df757fa16bd9c5b5f9b2fd075e47db1
font_01_sfnt_off0000d6a7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD6A7 9896 bytes
SHA-256: 78e8545bbf0b1554e0324927971d9164086552c553f45fb195bbe2cadba04900