Malicious PDF — malware analysis report

Static analysis result for SHA-256 6171b89e10311ca7…

MALICIOUS

PDF

91.1 KB Created: 2021-03-29 14:54:17 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-24
MD5: 7f9d909adf5d83a5371757a0986e7b27 SHA-1: 265d63741d2e815c5833e65a1d22b359d170c65a SHA-256: 6171b89e10311ca76c3b787c71ad2e11eeb005cb9565319a9b1b1f26ee1d1679
186 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious File T1059.007 JavaScript

This PDF document was flagged by ML classifiers and ClamAV as malicious, exhibiting characteristics of a phishing or trojan delivery mechanism. It contains numerous embedded URLs, many pointing to disposable hosting, and employs a lure to encourage users to enable content, a common tactic for malware droppers. The document's structure and embedded links suggest it is designed to facilitate the download of a secondary payload.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9990

Heuristics 7

  • 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.
  • Macro/content-enable lure medium SE_ENABLE_LURE
    Document instructs the user to enable macros or editing — a common technique used by malware droppers to bypass Office macro security settings
  • 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://fokemale.ru/strik?utm_term=php+mysql+para+dummies+espa%25C3%25B1ol+pdf PDF link annotation
    • http://evatopshop.xyz/fellow_eternal_clash_classeslpm89.pdfIn PDF document text
    • https://xetuvamabur.weebly.com/uploads/1/3/1/4/131409037/7066734.pdfIn PDF document text
    • https://gukepofefefika.weebly.com/uploads/1/3/1/4/131437977/447f6d6052f7a.pdfIn PDF document text
    • http://wiinorama.space/kixedumozuropaf5yrbe.pdfIn PDF document text
    • http://dorisedijizido.iblogger.org/are_samsung_fridges_reliable.pdfIn PDF document text
    • http://italiahot.space/83165632162u6ryr.pdfIn PDF document text
    • https://bazafegaxu.weebly.com/uploads/1/3/1/3/131383427/7733900.pdfIn PDF document text
    • https://gujukajiw.weebly.com/uploads/1/3/1/4/131437807/vulezekipufi_simuwikojef_sofaw.pdfIn PDF document text
    • http://fdvsefwfrw.space/colliers_minneapolis_industrial_reportwvw3k.pdfIn PDF document text
    • https://pudisemibupar.weebly.com/uploads/1/3/4/0/134096773/tefid_mepopitox.pdfIn PDF document text
    • http://groby-ritual.online/tipos_de_fallas_en_cimentaciones_superficiales4it04.pdfIn PDF document text
    • https://mugibamarenov.weebly.com/uploads/1/3/4/1/134109107/168a4b0ac.pdfIn PDF document text
    • http://fontawesome.iohttp://fontawesome.io/license/In PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://wulibazosuxib.onlinewebshop.net/advanced_excel_tutorial_2016.pdfIn PDF document text
    • http://diveruwafulebes.epizy.com/92227869886.pdfIn PDF document text
    • http://luxupovokajaf.onlinewebshop.net/unix_bash_shell_scripting.pdfIn PDF document text
    • http://kunipotow.epizy.com/89401744484.pdfIn PDF document text
    • https://s3.amazonaws.com/vaxebisapesi/vebumujijapese.pdfIn PDF document text
    • http://lozabozirazal.rf.gd/dinexokepedofin.pdfIn PDF document text
    • https://s3.amazonaws.com/bupijila/how_to_clean_hamilton_beach_dual_coffee_maker.pdfIn PDF document text
    • https://s3.amazonaws.com/muvarelo/7873519086.pdfIn PDF document text
    • https://s3.amazonaws.com/xuzakob/femexukubinuzuxajixifa.pdfIn PDF document text
    • http://pekijokedod.rf.gd/53452857269.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 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000104a7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x104A7 3800 bytes
SHA-256: 226d71f16d54d728bd7de32d8acdaf9a9fad157985891d8958e6ea013d8ac4ab
font_01_sfnt_off000111ea.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x111EA 2544 bytes
SHA-256: e818057e7133a25b31975a6d57f2281226200a2593c1152d84e8e7fa353a22c9
font_02_sfnt_off00011cdd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11CDD 5724 bytes
SHA-256: 520b1ac2d897a379333c7eecffed70e8f546afe0a1b1a852157e60481336ac99
font_03_sfnt_off00012fec.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12FEC 13488 bytes
SHA-256: 95c8cdc40d9235324da0dd76a902c326d20abe3e0db2d2448ddaa271110da7e7