Malicious PDF — malware analysis report

Static analysis result for SHA-256 47c3a4d5db48f034…

MALICIOUS

PDF

79.5 KB Created: 2021-03-13 21:14:59 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-20
MD5: c0ec6351b65ebd51bf4cd3e4c466a83c SHA-1: a2599d96827eb8e3934945c954a1629ae9ff616c SHA-256: 47c3a4d5db48f0342e7bfc486eb2de9c1e4d2932f8f5161012829c8b7b0637be
156 Risk Score

Malware Insights

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

The PDF contains a large number of external links, many of which point to unrelated content, indicating a link farm or SEO manipulation tactic. The ClamAV detection and ML classifier strongly suggest malicious intent, likely related to phishing or malware distribution. While no scripts were explicitly extracted, the PDF structure and numerous external URLs are indicative of malicious activity.

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://jacksth.ru/strik?utm_term=pentair+minimax+nt+parts+diagram PDF link annotation
    • http://kepibarufot.22web.org/jean_jacques_rousseau_social_contract_sparknotes.pdfIn PDF document text
    • https://pusenosate.weebly.com/uploads/1/3/5/3/135347115/wodanalabanut-mudizav-pibogojigasajob.pdfIn PDF document text
    • https://fufilotaniwa.weebly.com/uploads/1/3/5/3/135321354/jimozigakuvapube.pdfIn PDF document text
    • http://tixomuwenape.22web.org/bipawamimi.pdfIn PDF document text
    • https://puzomukasudugun.weebly.com/uploads/1/3/4/8/134865935/xojuzopaj.pdfIn PDF document text
    • https://kegozorud.weebly.com/uploads/1/3/0/7/130740561/dagaromurofov_miwaforilujivit.pdfIn PDF document text
    • https://ruwagifixub.weebly.com/uploads/1/3/4/0/134013037/pefubuxin.pdfIn PDF document text
    • https://pazopoxe.weebly.com/uploads/1/3/5/2/135293382/witunobotokum.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/636f3979-1722-4941-bd1c-f2981916a4e8/section_138_of_negotiable_instruments_act_latest_amendment_2020.pdfIn PDF document text
    • https://s3.amazonaws.com/wazorixekunafob/ayo_and_teo_rolex_lyrics_video.pdfIn PDF document text
    • https://s3.amazonaws.com/fukepez/26728627399.pdfIn PDF document text
    • http://lavaraf.epizy.com/spin_master_robot_cat_instructions.pdfIn PDF document text
    • https://s3.amazonaws.com/tinezedu/oxford_english_grammar_course_book.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/c440b1ee-a422-4a21-a530-d0564d81670f/65046125953.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/bc42994e-3e39-40c0-b782-07061cdd82ef/matebitesubid.pdfIn PDF document text
    • https://s3.amazonaws.com/firigugixujotov/bobusotakitelibitilonog.pdfIn PDF document text
    • http://kapilijugewi.rf.gd/29248456710.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/0496281f-c45c-485e-8797-112008b859cc/1522070418.pdfIn PDF document text
    • https://s3.amazonaws.com/fatisake/ashton_manual.pdfIn PDF document text
    • https://s3.amazonaws.com/tesapibebujep/60812295686.pdfIn PDF document text
    • https://s3.amazonaws.com/mafavuzenoliki/property_damage_report_example.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_off0000fb51.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFB51 5316 bytes
SHA-256: e1091dade947d994393c25ab6b7901af073ce65cef4314921b705bf1148cecf6
font_01_sfnt_off00010d56.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10D56 10320 bytes
SHA-256: f662f74cdaea8717579bcc767940ec9d087a8f18ad496f70f7ac79e444b3d311

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