Malicious PDF — malware analysis report

Static analysis result for SHA-256 20bc49fe6aa90abf…

MALICIOUS

PDF

74.6 KB Created: 2021-03-01 23:59:52 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-04-25
MD5: c6ad1591cc3683d62b1fac9520b43fae SHA-1: 7e3ce1f3ebf4c2dc5fc86fdc756a9922c5bf4a47 SHA-256: 20bc49fe6aa90abf695dadfb683175449030d61561e3bbe91e5d12e7216454f7
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://jottigo.ru/strik?utm_term=how+to+study+for+hesi+exit+exam+2019 PDF link annotation
    • https://rurasaza.weebly.com/uploads/1/3/4/8/134869927/5757020.pdfIn PDF document text
    • https://savibivo.weebly.com/uploads/1/3/1/3/131381036/a38744d4a0d.pdfIn PDF document text
    • https://cdn.sqhk.co/tedefoso/frhdLhb/messenger_update_2020_free_download.pdfIn PDF document text
    • http://patajafurep.mywebcommunity.org/what_does_garmin_lmt_d_mean.pdfIn PDF document text
    • https://woremudof.weebly.com/uploads/1/3/4/7/134701645/zofedupevepuf.pdfIn PDF document text
    • https://cdn.sqhk.co/zapimafe/bnbQ3ge/world_of_kings_best_talent_guide.pdfIn PDF document text
    • https://cdn.sqhk.co/zuzikewed/cifEhaU/free_steam_keys_generator_2020.pdfIn PDF document text
    • https://bamigabimav.weebly.com/uploads/1/3/1/6/131636977/9757137.pdfIn PDF document text
    • http://kujamemapevubu.mypressonline.com/hermle_clock_movements_manual.pdfIn PDF document text
    • https://zomerasojukoluw.weebly.com/uploads/1/3/4/7/134769652/monidimutajowej-wodese-duforivoku-tivejowu.pdfIn PDF document text
    • https://cdn.sqhk.co/kitujesijak/hKl41t6/lepoxopuvomovopikiputejex.pdfIn PDF document text
    • https://cdn.sqhk.co/fepogosu/0aQS3We/72019224370.pdfIn PDF document text
    • https://cdn.sqhk.co/seponidozit/acWgj5Q/school_fees_management_system_php_github.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4484154/normal_6016b319e9896.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://zijedan.atwebpages.com/wibusinabiforizefetira.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_off0000e3e1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE3E1 5820 bytes
SHA-256: 4b1e4671f12706e2c413f4b1b61a731bbf70ad3dd286a23157a79e7ad68da728
font_01_sfnt_off0000f79e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF79E 11188 bytes
SHA-256: d026f8834fa4acfb96401e16e3a4304fbf11247fa5cdcfb38f20a9b6012f7bcc