Malicious PDF — malware analysis report

Static analysis result for SHA-256 f161277539882440…

MALICIOUS

PDF

69.6 KB Created: 2020-12-17 11:40:07 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-11
MD5: 76292ab6f58692f1ff272dce67b08e42 SHA-1: 6c02e575abbbffa2c35ba23cae01764a21697024 SHA-256: f1612775398824406f4490b22c73d9042c2d654746f3d52562aa9d3f95c4891c
156 Risk Score

Malware Insights

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

The PDF file contains a heuristic firing for a large number of external links, suggesting a link farm or SEO spamming attempt. One of the external URLs, 'https://trafftec.ru/strik?utm_term=best+french+movies+of+all+time', is flagged as unknown reputation and is likely the primary malicious destination. The document body, though heavily obfuscated, appears to be a lure related to "best french movies of all time". The presence of PDF-specific heuristics and the overall structure indicate a malicious document designed to redirect users to potentially harmful content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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 contains mass external PDF link farm critical PDF_SEO_LINK_FARM
    Small PDF contains many clickable external PDF links, mostly clustered on one host. This matches generated SEO/link-farm PDF carriers used to route users into malicious or unwanted-software delivery chains, rather than a normal document citation pattern.
  • 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://trafftec.ru/strik?utm_term=best+french+movies+of+all+time PDF link annotation
    • https://vabekozel.weebly.com/uploads/1/3/4/4/134487462/nojenonakobo.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://static1.squarespace.com/static/5fc5bc8d16f6d44b07dfa7da/t/5fcac8daf3ad1602c6a243fa/1607125215212/miketuzinonirabuwadula.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/eef9939a-fff4-43ae-ae2e-6f8ecf991d7c/suicide_manual_2003.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc17dd3405d5340f32dc63c/t/5fc4646e5147b14804bf5eb1/1606706288196/an_entry_for_dividends_is_not_made_on_the.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/ae97e61c-156f-448a-96f8-6cc3ae9c17b7/dr_otto_and_the_riddle_of_the_gloom_beam.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/b49bc51d-ab4f-49a1-b02a-0856d055f267/9073750753.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/b4f3f637-6a2a-4a71-adcf-ab47916b69a2/54732910291.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/3d536d6e-3abe-4fd6-9088-80578d1c48ae/pycharm_raspberry_pi.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc646218ef7301f8b3592d3/t/5fcb2a03190ee82df8d8aa51/1607150083661/hyperspace_mountain_lights_on_paris.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc70b075c272238a817d8b0/t/5fcf1485b8233e30dfa37dc0/1607406727682/kung_fu_basketball_full_movie_tagalog.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc112aed26ff1194f74a888/t/5fc2527d08845d0924d59b1e/1606570621944/posicion_de_sims_usos.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc519ee9698b02c7f3bc40c/t/5fd03b2cb8bf0379e603f6cd/1607482156933/pesapotiroxusetigojus.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_off0000d457.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD457 5228 bytes
SHA-256: 263334533aaa08d2be972fe9ad162e792f87dcfc2439e37fa8804d02af89d03e
font_01_sfnt_off0000e601.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE601 10864 bytes
SHA-256: d0e5835746cf6fbe744859b3ae859106bca2dbb2575f8b1e1ad4455828d405c0

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