Malicious PDF — malware analysis report

Static analysis result for SHA-256 7bd41a41ca24dd5c…

MALICIOUS

PDF

78.9 KB Created: 2020-11-11 03:03:09 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-26
MD5: 2387938153775c857e2608dc04f3a9f3 SHA-1: 150b5d53f50800f32025f1e3a3d7d0f6e6f93769 SHA-256: 7bd41a41ca24dd5c2c9798f5b01858edbf9b4e57b128a822f75deb69d90e697f
146 Risk Score

Malware Insights

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

The PDF file was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. The presence of an external URI pointing to 'traffnew.ru' suggests a phishing or malware distribution attempt. The PDF_SEO_DISPOSABLE_LINK_FARM heuristic further supports this by indicating the PDF is a link farm hosted on disposable infrastructure, designed to redirect users to malicious sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 6

  • PRC/3D content in PDF medium CVE related PDF_PRC_3D
    PDF contains PRC 3D content. PRC/U3D parsers have been a recurring Adobe Reader attack surface; treat as a related parser-exploit indicator rather than a specific CVE match.
  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • Small PDF is a non-clustered link farm on disposable hosting medium PDF_SEO_DISPOSABLE_LINK_FARM
    Small PDF contains many clickable external PDF links spread thin across many distinct hosts (no single dominant host), corroborated by a utm_term SEO-redirector link and/or links parked on free/disposable content hosts. This is the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains, rather than a normal document citation pattern. The PDF itself carries no exploit — the risk is the linked destinations.
  • 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://traffnew.ru/123?keyword=uw+madison+concur+fox+world+travel PDF link annotation
    • https://besajiti.weebly.com/uploads/1/3/1/8/131856076/7468464.pdfIn PDF document text
    • https://rogapunuki.weebly.com/uploads/1/3/4/3/134375427/3906053.pdfIn PDF document text
    • https://xazojitov.weebly.com/uploads/1/3/1/4/131408465/b95866.pdfIn PDF document text
    • https://nuburobu.weebly.com/uploads/1/3/4/6/134633580/musanun.pdfIn PDF document text
    • https://mifuvepezomiluf.weebly.com/uploads/1/3/4/3/134312517/dogewise-bukamuzife.pdfIn PDF document text
    • https://xibogunef.weebly.com/uploads/1/3/1/3/131398295/83c56c7.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/893070ec-fa39-40c7-b800-015321d475e8/53930921765.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/c8ddc4f6-8cb7-4bee-9f31-4144f564ceba/handel_dixit_dominus_sheet_music.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/59f53c5c-1e83-4f6e-b23e-e4a409ff6b88/38318385536.pdfIn PDF document text
    • https://s3.amazonaws.com/jimugivos/nintendo_games_apk.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/852064ea-85be-426e-9f58-bd9a1c77cb5b/82748643996.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/fb04fddc-f62c-4553-8fb6-50d31102594b/77614020492.pdfIn PDF document text
    • https://s3.amazonaws.com/xojafemori/from_the_desk_of_template.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/42409d48-c5d6-4ec1-be87-5b38a30af5f6/the_continental_op.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/4d8e528b-1aaa-422b-a55f-b77a39c151a2/57724401728.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000db91.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDB91 5376 bytes
SHA-256: 08687706160cc7b6ae8592889621287946006243ead9a4f17bd379d927da1501
font_01_sfnt_off0000ede2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEDE2 10824 bytes
SHA-256: b630ecc472f7f50fd4d4591b43254f8197c2c49e8f61aca1e16567ea8edeaff7
font_02_sfnt_off00011317.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11317 17712 bytes
SHA-256: 3b07890862b184a44854421174d54480becf85d93bfb0c19dbfe01ea5c527683

Open this report in the interactive analyzer, or submit your own file for analysis.