Malicious PDF — malware analysis report

Static analysis result for SHA-256 d6d0b14cd8faffe3…

MALICIOUS

PDF

83.8 KB Created: 2021-06-09 12:11:11 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-27
MD5: 6b56b63cbfa089317bd0e989fcb9da6d SHA-1: e3e3a5e3eaa466ccfc9e45071026f2badf4dde0d SHA-256: d6d0b14cd8faffe36797a64f1645b00a33e29e02ff6f487bf8216a7df7555e21
96 Risk Score

Malware Insights

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

The PDF file was detected as malicious by ML classifiers and ClamAV, specifically flagged as a phishing trojan. It contains an embedded URI pointing to 'philabc.ru', which is likely a phishing or malware distribution site, disguised with a lure related to 'Five Nights at Freddy's'. The document body, though heavily obfuscated, contains metadata suggesting it was generated by wkhtmltopdf, a tool often used to create PDF documents from web content, further supporting the idea of a web-based lure.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9978

Heuristics 4

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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://philabc.ru/pbw?utm_term=five+nights+at+freddy%2527s+minecraft+map PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4456667/normal_602b514a34de3.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4403119/normal_5fdd38c0b27ac.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4409095/normal_601bab8cdbcf5.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4452217/normal_602753427a093.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4426423/normal_6028c38e77bc1.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4393220/normal_602feb0432273.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4379610/normal_6004d98b14839.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4370092/normal_5ff0ddf68b28e.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4408174/normal_606d68983e5eb.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4496812/normal_6059eeba5c660.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4493245/normal_6031359c5410b.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4495043/normal_5fc7eef201800.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • https://uploads.strikinglycdn.com/files/61f953ab-1f05-471e-883f-dd21ae609278/78239077869.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/04a3b06a-6377-49a4-acf3-2ac58ea038b1/montgomery_al_child_support_payment_center.pdfIn PDF document text
    • http://vuxoris.pbworks.com/w/file/fetch/144844131/janeway_immunobiology_8th_edition_download.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/033b9901-7ef7-4e66-8442-848bf9d62b44/what_is_a_visual_argument.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/bd7606ab-cfee-4511-beb3-38d21b7c7aae/ruins_of_myth_drannor_map.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/ab5e846e-836c-4988-b633-116518bccd94/what_is_a_30_regular_in_jeans.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/b03ebe2b-a3ba-4788-a742-4d02896a2f01/aimpoint_pro_with_6x_magnifier.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/5043c5e7-e8db-44e2-9463-9648d0d7d5aa/autocad_electrical_job_salary_in_india.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/ad0de327-6c60-4386-94a7-73f98013e0a7/27509050187.pdfIn PDF document text
    • http://gipomebepate.pbworks.com/w/file/fetch/144655002/acca_cia_challenge_exam_study_material.pdfIn PDF document text
    • http://bovojigu.pbworks.com/w/file/fetch/144420204/baby_corn_snake_feeding_schedule.pdfIn PDF document text
    • http://pitavumiza.pbworks.com/w/file/fetch/144903915/gezasamogalavuzunirigex.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
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e463.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE463 5368 bytes
SHA-256: 67907c235d019680a259243d4905d2e636ad6a996425bcf614dd13b61bfce972
font_01_sfnt_off0000f68e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF68E 11120 bytes
SHA-256: 3d343569ec693f2d7e354b39e58122619f143a6b00dd0838c6d4f21e31fe2d73
font_02_sfnt_off00011ce4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11CE4 16336 bytes
SHA-256: 18820e64b89489c6901bdbad9637cefc87d81bb55776bf10726fbc7439458c45
font_03_sfnt_off00013266.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13266 4324 bytes
SHA-256: ce7e2e230a41ba6fc2d7d2240890c8289d67876d84a3d076d67c0b48111c8230