Malicious PDF — malware analysis report

Static analysis result for SHA-256 8791ec0b8cb39dc9…

MALICIOUS

PDF

69.6 KB Created: 2021-02-04 15:40:38 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-04-25
MD5: 05881fa342646d973c5dd9ede3d667ee SHA-1: aa3c1416fbf579982c5ebed6c9ebaa2d426adce0 SHA-256: 8791ec0b8cb39dc900c0ce3fedf23808655abb6a41577516e42c773968e5d50f
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/wb?keyword=business%20letter%20writing%20skills%20pdf PDF link annotation
    • http://autocredit.moscow/free_blues_radio_uk8ls1h.pdfIn PDF document text
    • http://antonio-ita.space/alien_swarm_reactive_drop_infestationn14l7.pdfIn PDF document text
    • https://vitasexabu.weebly.com/uploads/1/3/0/8/130813400/punapadazobapawiwum.pdfIn PDF document text
    • http://com-copyrighit.com/61979666190ssoox.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4410006/normal_5ff2a2086360c.pdfIn PDF document text
    • http://xbet1.fun/63051118847312pa.pdfIn PDF document text
    • http://dorightunion.com/85781503984qmnos.pdfIn PDF document text
    • https://valuluxunu.weebly.com/uploads/1/3/2/7/132710491/2dc09923b.pdfIn PDF document text
    • http://domsale.xyz/contract_agreement_samplemu5tk.pdfIn PDF document text
    • https://nipetetoxijekuj.weebly.com/uploads/1/3/4/7/134718304/fogubexokanugitaf.pdfIn PDF document text
    • https://tenomexob.weebly.com/uploads/1/3/1/1/131163969/da3a4b.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4369322/normal_6017a2e6e69b0.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4391621/normal_5ff27966d3d75.pdfIn PDF document text
    • https://cdn.sqhk.co/miraroki/fhdidOG/pac_man_and_ghostly_adventures_season_3.pdfIn PDF document text
    • https://cdn.sqhk.co/tewokozogop/FWDifje/tofadarexejug.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/xeropizuwe/adobe_flash_player_cs6_free_trial.pdfIn PDF document text
    • https://s3.amazonaws.com/pesetufavo/dateruwexomom.pdfIn PDF document text
    • https://s3.amazonaws.com/jepavilutabilel/practice_worksheet_relations_functions_domain_and_range.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_off0000d5d9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD5D9 5204 bytes
SHA-256: f000920476eee24996afd027640f3a2041271fefc9bb48caf7e12b56f1285d6e
font_01_sfnt_off0000e7b9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE7B9 9900 bytes
SHA-256: 4245e29475f2da9fbbce66ee4c0060b66f5a6c1549000bbc3e5b3dee15aea109