Malicious PDF — malware analysis report

Static analysis result for SHA-256 647e28e8879867d7…

MALICIOUS

PDF

78.2 KB Created: 2021-02-22 16:32:01 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-23
MD5: bd1b11a11b27b000a2c6c1536facb98c SHA-1: d1a0c98a8216d322d317c456c82ae0677f56158c SHA-256: 647e28e8879867d7fe4cbe120ade9f1febe6b69187ccc5a8bddfb821301a5e7a
156 Risk Score

Malware Insights

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

The PDF file contains a large number of external links, many of which point to PDF files hosted on file-sharing services, indicating a link farm or redirection scheme. The ML classifier and ClamAV detection strongly suggest malicious intent, likely for phishing or distributing further malware. Although no scripts were explicitly extracted, the PDF structure and numerous external URIs 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://bologen.ru/aws?utm_term=corporate+identity+design+book PDF link annotation
    • https://wozavosasegug.weebly.com/uploads/1/3/4/5/134509229/44823959.pdfIn PDF document text
    • https://cdn.sqhk.co/fodexuxefeba/3ibvicm/piggy_in_carnival_chapter_8_ending.pdfIn PDF document text
    • https://galewijukinez.weebly.com/uploads/1/3/2/6/132695540/6187426.pdfIn PDF document text
    • http://jigunemav.22web.org/11455772491.pdfIn PDF document text
    • https://cdn.sqhk.co/zotofoza/jahg1aP/86836185635.pdfIn PDF document text
    • https://cdn.sqhk.co/wixefawoz/gdijKxw/27810259087.pdfIn PDF document text
    • http://info-pages.ru/uh-60m_aircrew_training_manual58kwm.pdfIn PDF document text
    • https://cdn.sqhk.co/zamodozitip/gjzwihA/absorption_spectroscopy_of_water_vapor.pdfIn PDF document text
    • https://cdn.sqhk.co/xovepejegosi/hgoOhjA/spider_nest_simulator_insect_and_3d_animal_game.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://wutugegazebezop.rf.gd/analysis_of_algorithm_book.pdfIn PDF document text
    • http://wixufoliwesomep.epizy.com/shirt_template_design.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://www.geocities.com/mitra_anirban/hobbies.htmGNUIn PDF document text
    • http://www.gnu.org/copyleft/gpl.htmRegularIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000ea08.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEA08 5308 bytes
SHA-256: bd29e6e0e6ebd291424b6a3dbe50526201012a8d6d26796cda3614714f7072b7
font_01_sfnt_off0000fc1c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFC1C 3720 bytes
SHA-256: d0c9e33916e9e64e42e31bcf0d345f6c2fcd41735b1a34df0119bd0eb1094281
font_02_sfnt_off00010780.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10780 10660 bytes
SHA-256: 37ad82ea31c89195cd7a58338a13ad5344a6853905242c8c643eac6f222f0524

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