Malicious PDF — malware analysis report

Static analysis result for SHA-256 7d0af4fe445d39f3…

MALICIOUS

PDF

72.0 KB Created: 2021-02-14 05:43:58 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-06-20
MD5: 00ad55ae16412ab6b1c86fe982a51020 SHA-1: 619847dc4faa4a66583d5303659147ca2b9c5de5 SHA-256: 7d0af4fe445d39f3ce2aff796742e661f462a47eb7c4318825ec4c20a2e94694
166 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF contains numerous embedded URLs pointing to disposable domains, a common tactic for hosting malicious content and evading detection. The 'SE_PASSWORD_ARCHIVE_LURE' heuristic indicates the document likely instructs the user to decrypt a password-protected archive, a method used to hide malware from static analysis. The ML classifier and ClamAV detection strongly suggest malicious intent, likely related to phishing or malware delivery.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • Password-protected archive handoff high SE_PASSWORD_ARCHIVE_LURE
    Document gives password instructions for an archive or attachment — often used to keep payloads encrypted until after gateway scanning
  • 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://jacksth.ru/wb?keyword=winzip%20free%20online PDF link annotation
    • http://pejofewetoz.22web.org/zelepap.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4365546/normal_6015ccad770b5.pdfIn PDF document text
    • https://fimulumalopa.weebly.com/uploads/1/3/5/3/135326017/pawuxugugevukam.pdfIn PDF document text
    • http://prizyivnik.ru/deadlands_rpg_downloadq1yk0.pdfIn PDF document text
    • http://gizapiretade.iblogger.org/tamilrockers_tamil_movies_2018_full_movie.pdfIn PDF document text
    • https://xuvupidorok.weebly.com/uploads/1/3/1/4/131407629/fokupefimeliter.pdfIn PDF document text
    • http://busivel.xyz/13204851729tuqto.pdfIn PDF document text
    • https://mitewowepo.weebly.com/uploads/1/3/0/8/130813710/8108590.pdfIn PDF document text
    • https://jabipiduluw.weebly.com/uploads/1/3/4/6/134662585/3427725.pdfIn PDF document text
    • http://fafaviga.iblogger.org/78725433074.pdfIn PDF document text
    • http://50offshop.pro/jodudortp1o.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • http://tixuxunu.epizy.com/dcf_florida_income_verification_form.pdfIn PDF document text
    • http://guruwemuzotal.epizy.com/65391719973.pdfIn PDF document text
    • http://kupikobu.epizy.com/case_in_point_free.pdfIn PDF document text
    • http://raseloxezonavo.epizy.com/antivirus_android_gratuito_2019.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000cf6d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCF6D 4280 bytes
SHA-256: 7c1ce6aebb1b58e0153d08c0432f839589a273481d1517cbb028a7ab4f43ebc3
font_01_sfnt_off0000ddfd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDDFD 12376 bytes
SHA-256: dad7e757c4b1dd45e9374782e8ae1ebe3a0a6842f030895337886b9255d7eacd
font_02_sfnt_off000103f6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x103F6 4324 bytes
SHA-256: ad623bc7c681097dfa1224999cf6cc6072d3ca9a137655dc1129b0261f0b357c

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