Malicious PDF — malware analysis report

Static analysis result for SHA-256 8b98699d3619ff8d…

MALICIOUS

PDF

76.9 KB Created: 2021-03-10 08:09:36 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-16
MD5: 4ae751b404dab8111116ba3fbc136266 SHA-1: bc838c57f4ec00acc62cd26d4771b74f2e498dc9 SHA-256: 8b98699d3619ff8dc3e03ff6de5ba9b318da81e7a15204c716a162ced2fbfe3c
146 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript T1203 Exploitation for Client Execution

This PDF document was flagged by multiple heuristics, including ML classification and ClamAV, as malicious phishing content. The 'SE_CALLBACK_LURE' heuristic indicates the document likely prompts the user to call a phone number under the guise of a billing or refund issue, a common tactic for callback phishing scams. While no scripts were explicitly extracted, the presence of numerous external URLs and the PDF's structure suggest it is designed to redirect users to malicious sites or facilitate social engineering.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

Heuristics 6

  • 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.
  • Callback phishing phone lure medium SE_CALLBACK_LURE
    Document asks the user to call a phone number in billing, refund, subscription, fraud, or security context — consistent with callback phishing or tech-support scam patterns. Suppressed for legitimate-issuer (IRS/gov/official-form) documents that carry no urgency or charge/dispute escalation.
  • 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://kuzutuzo.ru/123?utm_term=android+gmail+auto+sync+interval PDF link annotation
    • https://cdn.sqhk.co/nomevagume/u0pgg07/tebit.pdfIn PDF document text
    • http://tiwovurof.iblogger.org/damotekefebomif.pdfIn PDF document text
    • https://jixawapideraje.weebly.com/uploads/1/3/3/9/133997308/7c5c9eaa6ef2231.pdfIn PDF document text
    • https://xopaluwejur.weebly.com/uploads/1/3/1/8/131857284/3224084.pdfIn PDF document text
    • http://powerhdniy.space/how_to_reset_password_on_panasonic_phonev2omg.pdfIn PDF document text
    • http://blacktea.space/hardwood_flooring_cost_calculator_australiarhjym.pdfIn PDF document text
    • https://cdn.sqhk.co/dobajinorite/vhfToic/piano_tiles_mod_apk.pdfIn PDF document text
    • http://gtmedis.com/rexesabio3z.pdfIn PDF document text
    • https://jovawovifo.weebly.com/uploads/1/3/4/8/134883275/4071259.pdfIn PDF document text
    • https://buzijivugaza.weebly.com/uploads/1/3/4/7/134709386/wupojetadalinoziwe.pdfIn PDF document text
    • http://ompala.store/direpopaxidibefaxury9oc6.pdfIn PDF document text
    • http://politach.com/banglarbhumi._gov._in_khatian_plot_information_2019cx2k5.pdfIn PDF document text
    • https://cdn.sqhk.co/nadoranur/jif4k16/best_free_graphic_design_software_for_t_shirts.pdfIn PDF document text
    • https://vajipexinonadol.weebly.com/uploads/1/3/4/0/134096003/duxagenajowu_wujovoki.pdfIn PDF document text
    • https://cdn.sqhk.co/nefakovuwot/ibjfPTG/singplay_karaoke_your_mp3_mod_apk.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/mukut/what_is_bangladesh_known_for_food.pdfIn PDF document text
    • https://3c8197b3-f999-4f29-b3da-fbdfea3dbf34.filesusr.com/ugd/0047a4_57b322d9c60146e092576ce98db53dcb.pdf?index=trueIn PDF document text
    • http://vibiwesipo.rf.gd/antecedentes_historicos_de_la_fisica_antigua.pdfIn PDF document text
    • https://s3.amazonaws.com/bisapovepizaj/bcbs_federal_provider_forms.pdfIn PDF document text
    • http://gozusufopam.epizy.com/guzafeketodiz.pdfIn PDF document text
    • https://d09251a9-b09e-4077-8ccb-24037f005f7b.filesusr.com/ugd/a6ce17_ca85d70c04d54fa3bc13e6fa8bd1aeca.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/sevoga/fun_activities_worksheets_for_preschoolers.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_off0000ee3f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEE3F 5412 bytes
SHA-256: cc03dd1c8d7a44a06a9eea9a2f713bc5d12651d653ae0937c8670704322a1069
font_01_sfnt_off0001009b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1009B 11076 bytes
SHA-256: d9c5e6c3014952ba0f4f2d9eb8371c424ff54f1bfc9edd2207411cb8e14733f8

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