Malicious PDF — malware analysis report

Static analysis result for SHA-256 ce8ee4779a79e05e…

MALICIOUS

PDF

198.6 KB Created: 2021-03-21 23:18:46 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-07-07
MD5: 43344b4ba05692c37490b36794f4af56 SHA-1: 572e30177c57dd767b934c823c058de669195a10 SHA-256: ce8ee4779a79e05e90de387874af53e3f3d8ee9f2b9bc7c680983a49f23e89c8
116 Risk Score

Malware Insights

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

The file was detected as malicious by a machine learning classifier and ClamAV, specifically flagged as a phishing trojan. Heuristics indicate it contains external URIs and a callback phishing lure, suggesting it aims to trick users into contacting a malicious entity. While no scripts were explicitly extracted, the PDF structure and embedded URLs point towards a phishing attempt, likely delivered as a spearphishing attachment.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9856

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
  • 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://zajinet.ru/award?keyword=software+architecture+document+template+pdf PDF link annotation
    • https://cdn.sqhk.co/kinanekoxo/ZChco48/fibedagilen.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4495975/normal_6032de58e006c.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4424361/normal_5fcf3c00ea04d.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4367301/normal_60547b22c46f3.pdfIn PDF document text
    • https://cdn.sqhk.co/mivadunoxo/8MDhdji/1249952438.pdfIn PDF document text
    • http://xufuzema.sportsontheweb.net/new_world_order_book_download.pdfIn PDF document text
    • http://gazajujana.mygamesonline.org/what_is_the_best_iced_coffee_from_dunkin_donuts.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4366063/normal_5ffbff21617b9.pdfIn PDF document text
    • https://cdn.sqhk.co/mukibusu/Gtihgfv/learn_to_sing_in_tune_app.pdfIn PDF document text
    • http://xebupado.mypressonline.com/why_does_my_lg_top_loading_washing_machine_smell.pdfIn PDF document text
    • https://cdn.sqhk.co/tobepeliv/FYgf2zZ/ubuntu_14._04_lts_32_bit_iso.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4413838/normal_5fca6d34711c7.pdfIn PDF document text
    • https://cdn.sqhk.co/pofoxubo/ZjgJKEM/at_z_mp3_ringtones_free_download_telugu.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://uploads.strikinglycdn.com/files/7e71725a-bc29-435d-a9a9-41a52b9eb189/new_moon_rituals_august_2020.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/d7476ff9-78cd-48ad-a513-1a1d19637b08/sarejilatolepugojujeno.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/9cc8c081-12b4-4b70-9f18-3d557c83b12f/22942038227.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/e366d708-bb25-4fa3-b416-a936473dc29b/ti-34_multiview_battery_change.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/71778235-4343-4f98-a0dd-d506e47f6817/fomufufaguda.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/ec5be111-515e-4380-bf31-47ff79043445/zinadukakefogix.pdfIn PDF document text
    • http://jeximojela.myartsonline.com/1141230936.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/1b269d86-4de3-4269-a1c5-c7e34a8c8fc3/15579311621.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/284965d8-dd64-4ec2-8dc8-ed32fe2dbb26/eaton_18_speed_oil_capacity.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/08fe023f-82f0-457b-801f-d8a5f1bb591b/nubosabijozodikawerid.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_off0002d001.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x2D001 5412 bytes
SHA-256: fb6c8032d8313e0760a0346439146cfea35eb4508ada58d93aab931dfb1b4f30
font_01_sfnt_off0002e251.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x2E251 12348 bytes
SHA-256: 5c148884d7c0bdf244c2ffaf460f57ab14982372ebdce02eedc251b85fd58ab2