Malicious PDF — malware analysis report

Static analysis result for SHA-256 31d037a165115b93…

MALICIOUS

PDF

76.0 KB Created: 2021-02-06 13:59:02 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-04-25
MD5: 7ec87cad96091f1019eaae13e006c136 SHA-1: 30598f33f2c054a5d935158e7340388021ef7707 SHA-256: 31d037a165115b93877d868a1e0ac5c134826940648812058d137f584079afe6
126 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 5

  • 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 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/123?utm_term=glencoe+mcgraw+hill+algebra+2+chapter+4+answer+key PDF link annotation
    • http://fosukimiten.22web.org/32916066141.pdfIn PDF document text
    • https://cdn.sqhk.co/rewakevutel/e4TGgi2/hastings_crazy_golf_world_championship_2019.pdfIn PDF document text
    • http://zarabotok.space/linking_verbs_worksheet_answer_keys5ln6.pdfIn PDF document text
    • http://lnstagramsupportlives.com/9527208549214cpk.pdfIn PDF document text
    • https://cdn.sqhk.co/jenuluvonuz/ncjaQhh/sanezifakamuwugagejinek.pdfIn PDF document text
    • http://rekabiwuxu.22web.org/99100016986.pdfIn PDF document text
    • https://mafetoga.weebly.com/uploads/1/3/0/8/130874134/9243254.pdfIn PDF document text
    • http://tesidakikize.iblogger.org/gawepavovikuvakipadim.pdfIn PDF document text
    • http://connexion-amelii.xyz/gufejivenizarezubiponkws8m.pdfIn PDF document text
    • http://topsale.pro/bijubumapanapevuwosirljqp.pdfIn PDF document text
    • http://prizinsta.info/koboxavokikosuvpkdcv.pdfIn PDF document text
    • http://help-ruleviolation.com/rachmaninoff_paganini_rhapsody_18th_variation7jgwm.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://suremosanox.rf.gd/best_caller_app_for_android_2019.pdfIn PDF document text
    • http://zekakodususebu.epizy.com/puxunovakafisuk.pdfIn PDF document text
    • http://wometopususap.rf.gd/woxewijev.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_off0000e981.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE981 5996 bytes
SHA-256: 5b6cbd71850525abc4f3c99d1c253a672a9f6b489c9648b30361b19836399d5f
font_01_sfnt_off0000fde4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFDE4 10856 bytes
SHA-256: f127e71f769dc2c39ac6a971cc25bd11505b46f49e33ca82233e3cda93a755b9