Malicious PDF — malware analysis report

Static analysis result for SHA-256 de5742d20b304402…

MALICIOUS

PDF

76.3 KB Created: 2021-06-09 20:08:00 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: cf728b374d751c480af8cb3f612dee17 SHA-1: 69b8fd10649337f390d44e8023e65eafbda27b14 SHA-256: de5742d20b3044022b369641234ca0a58d76128403646a025f3a8bb0ae02d64d
156 Risk Score

Malware Insights

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

The PDF file contains numerous external links, with a critical heuristic identifying it as a link farm. One of the primary URLs, 'https://philabc.ru/pbw?utm_term=watch+kaasav+marathi+movie+online', suggests a lure related to online movie content. The presence of a ClamAV detection for 'Pdf.Phishing.Trojan' and a high ML score further indicate malicious intent, likely for phishing or distributing further malware. No scripts were extracted, but the structure and link farm heuristic point to a malicious document designed to redirect users.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

Heuristics 5

  • 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.
  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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=watch+kaasav+marathi+movie+online
    • https://cdn-cms.f-static.net/uploads/4408460/normal_603e1d6339577.pdf
    • https://static.s123-cdn-static.com/uploads/4425010/normal_5fefb5a99548d.pdf
    • https://nepefesin.weebly.com/uploads/1/3/1/4/131410606/nusun.pdf
    • https://cdn-cms.f-static.net/uploads/4465025/normal_606e2526cf632.pdf
    • https://bevozuvegala.weebly.com/uploads/1/3/3/9/133999301/7698872.pdf
    • https://cdn-cms.f-static.net/uploads/4480588/normal_5fd294255d157.pdf
    • https://static.s123-cdn-static.com/uploads/4492253/normal_5fe1f8f21f928.pdf
    • https://vifiboreb.weebly.com/uploads/1/3/5/3/135349596/jesexu.pdf
    • https://gufovijer.weebly.com/uploads/1/3/5/3/135339237/a608fbad72f5.pdf
    • https://cdn-cms.f-static.net/uploads/4404757/normal_6063f70d91f8f.pdf
    • https://ginamelemu.weebly.com/uploads/1/3/4/6/134624442/2357071.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://www.daltonmaag.com/
    • http://sejiliki.pbworks.com/f/how_do_i_connect_hp_deskjet_3630_to_wifi.pdf
    • https://uploads.strikinglycdn.com/files/534daab4-e1ba-46eb-97c4-b6f96edda74c/fefunutovulelekuxenezi.pdf
    • https://uploads.strikinglycdn.com/files/3aab10a5-fdad-4d4e-86f4-d16917cea0f1/the_house_on_mango_street_comprehension_questions_and_answers.pdf
    • https://uploads.strikinglycdn.com/files/4d863e63-d3f2-4909-aef0-86eadfbca703/88900847968.pdf
    • http://nugurafuge.pbworks.com/w/file/fetch/144520410/89777170103.pdf
    • https://uploads.strikinglycdn.com/files/9dd5de43-af47-483e-8717-d253eb8050a5/sokotuvumuve.pdf
    • https://uploads.strikinglycdn.com/files/7f31a54b-22e5-4229-8908-a3d8fa8ef5a3/age_of_empires_2_definitive_edition_linux_steam.pdf
    • https://uploads.strikinglycdn.com/files/4dcba2db-7e88-4ab0-b6fc-39afb2df89d2/what_foods_constitute_an_alkaline_diet.pdf
    • https://uploads.strikinglycdn.com/files/72135e8c-163a-4533-906b-aaa246c15578/what_does_the_nurse_give_to_romeo_from_juliet_and_why_do_you_think_juliet_sent_it.pdf
    • https://uploads.strikinglycdn.com/files/c2b1c330-a77e-4c45-bd9e-12b03258b8c1/71428779723.pdf
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/
    • http://scripts.sil.org/OFL

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e050.bin
a8a6aabe531e9053aaf957fbaea4f0a962c275e7421a8c0e4262f202f88c8165
pdf-font-stream PDF embedded font (sfnt) at offset 0xE050 4964 bytes
font_01_sfnt_off0000f105.bin
63b85ab15e4d1a80e43d008e0a4262d8194cf1142204a92e570e25bbd5d77a49
pdf-font-stream PDF embedded font (sfnt) at offset 0xF105 10920 bytes
font_02_sfnt_off000115c8.bin
9f355172d696dda274cac500966718f112ce76951f19577ac4888987ea6471b2
pdf-font-stream PDF embedded font (sfnt) at offset 0x115C8 4324 bytes