Malicious PDF — malware analysis report

Static analysis result for SHA-256 6eb7c566eab99ee2…

MALICIOUS

PDF

77.4 KB Created: 2021-04-21 18:03:03 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-22
MD5: 95b07e8c7df3a860c69f1cfb36c4f32d SHA-1: d4ad58a6dc67bca081b2dd1b93471fe2e6763703 SHA-256: 6eb7c566eab99ee202b1b3e4dc8889d9e891ea06a58c4880025c4cc3269a524e
126 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

This PDF document was flagged as malicious by ClamAV and an ML classifier. The file embeds a large number of external links characteristic of an SEO link farm. Specific URLs and indicators for this sample are listed in the indicators section.

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://fokemale.ru/strik?utm_term=how+to+turn+off+vivint+thermostat PDF link annotation
    • https://static.s123-cdn-static.com/uploads/4461232/normal_5ffc353adf948.pdfIn PDF document text
    • https://cdn.sqhk.co/nivabetaz/hhgjehj/smash_burger_recipe_guga.pdfIn PDF document text
    • http://moresukko.ru/limelife_beauty_guide_logino7hhw.pdfIn PDF document text
    • http://vutajupej.iblogger.org/behavioral_economics_definition.pdfIn PDF document text
    • http://raicen.com/peter_and_wendy_movie_watch_onlinemhd9x.pdfIn PDF document text
    • https://cdn.sqhk.co/fuvavegipap/4nYGji7/csr_racing_2_game_for_android.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4370768/normal_5fe8fc846ed94.pdfIn PDF document text
    • http://rasudilikid.mywebcommunity.org/stamina_body_trac_glider_rowing_machine_1052_vs_1050.pdfIn PDF document text
    • http://walolexokesufa.sportsontheweb.net/galileo_sidereus_nuncius.pdfIn PDF document text
    • https://cdn.sqhk.co/jenireni/UohiMjc/nivumaboxefemavusuguneku.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4482191/normal_603301e9393fc.pdfIn PDF document text
    • http://baykamif.space/which_electron_configuration_violates_hunds_rule_the_2s22px22py22pz1pi8c7.pdfIn PDF document text
    • http://fepigubigi.iblogger.org/beta_sheet_hydrogen_bonding.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://gelodolisez.epizy.com/67620042412.pdfIn PDF document text
    • http://baduwujik.rf.gd/mystic_messenger_time_guide.pdfIn PDF document text
    • https://s3.amazonaws.com/jefazaxal/sony_cybershot_7.2_megapixels.pdfIn PDF document text
    • http://wowulikuvej.rf.gd/48094448302.pdfIn PDF document text
    • https://s3.amazonaws.com/tapelu/43736209321.pdfIn PDF document text
    • https://s3.amazonaws.com/dedinavesute/joshua_s_law_unit_7_answers.pdfIn PDF document text
    • https://s3.amazonaws.com/mokixetat/offline_oxford_thesaurus_apk.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_off0000ef22.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEF22 5088 bytes
SHA-256: 8a7479a9ee6e06de73eabb67b476cd1b3da084d2f439d6d5dbe29403ab3961f3
font_01_sfnt_off00010056.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10056 11188 bytes
SHA-256: d6c3000d95f447d2f8c0fa7e289ef82f9c2d3c6f3c3776b5b810b1d4c3d76fb7