Malicious PDF — malware analysis report

Static analysis result for SHA-256 8fd689b9d9d44e54…

MALICIOUS

PDF

71.4 KB Created: 2020-12-06 07:13:33 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 950b3986d6184d290d1a4ce16ede955a SHA-1: 576502ed60f82c632df54c1437daa235f908d7fc SHA-256: 8fd689b9d9d44e546401c552f3d38832473552e956b2858121ad90a6cdf33d9a
214 Risk Score

Malware Insights

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

This PDF file was flagged by multiple heuristics as malicious, including a critical finding for linking to known malicious redirector infrastructure. The document contains a large number of embedded URLs, suggesting it is part of a link farm designed to distribute malicious content or facilitate phishing. No scripts were extracted, but the presence of numerous external links points towards a phishing or malware distribution campaign.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

Heuristics 5

  • PDF links to known malicious redirector infrastructure critical PDF_MALICIOUS_REDIRECTOR_LINK
    PDF contains a clickable URI to redirector infrastructure used by a known malicious PDF SEO/adware delivery campaign. These documents typically rely on user interaction and redirect chains rather than a PDF parser vulnerability.
  • 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
  • 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://ggtraff.ru/strik?utm_term=painted+desert+sheep+price
    • https://sarejazaxixosib.weebly.com/uploads/1/3/4/6/134633098/0d4f4a8b.pdf
    • https://xosovixa.weebly.com/uploads/1/3/4/3/134318585/vuwawixudumuji.pdf
    • https://jikeberu.weebly.com/uploads/1/3/1/8/131857846/didojulujil-fewoke-jowan.pdf
    • https://rosuxemu.weebly.com/uploads/1/3/0/7/130776582/3fe00e91361cd0a.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://www.daltonmaag.com/
    • https://uploads.strikinglycdn.com/files/53fe9727-3dd3-4663-9341-1a39537d179e/xowuzenatozefojus.pdf
    • https://uploads.strikinglycdn.com/files/f2707ad0-30f1-4a34-8b82-e6debab5163f/dark_summoner_apk.pdf
    • https://uploads.strikinglycdn.com/files/4819ff5e-8877-41e3-8c7c-9da3419adbe7/thermometer_calibration_record_sheet.pdf
    • https://s3.amazonaws.com/xamibudasagas/acunetix_web_vulnerability_scanner_32_bit.pdf
    • https://uploads.strikinglycdn.com/files/f1d788f6-aedd-4315-b8d0-2429deed7347/jumugiligitewazosujos.pdf
    • https://uploads.strikinglycdn.com/files/be1435be-490c-4daa-b6f4-9bfdb8fc00c6/crash_bandicoot_ps1_gameplay.pdf
    • https://s3.amazonaws.com/dixaleko/pencil_drawing_anatomy.pdf
    • https://uploads.strikinglycdn.com/files/b6aa6f22-e69e-4ab8-b37d-7bc2b21e95fa/mobowesexifiju.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_off0000cb96.bin
73493301c490fd4c6f1f1c5e60ae97943ff9294dce2c031bd64c5b0beb1501c6		 pdf-font-stream PDF embedded font (sfnt) at offset 0xCB96 4808 bytes
font_01_sfnt_off0000dbcf.bin
837db3ca6179742507e9a515c81f81d6758e7ed6462d8de2623e59d9921ff568		 pdf-font-stream PDF embedded font (sfnt) at offset 0xDBCF 11444 bytes
font_02_sfnt_off000102aa.bin
ce7e2e230a41ba6fc2d7d2240890c8289d67876d84a3d076d67c0b48111c8230		 pdf-font-stream PDF embedded font (sfnt) at offset 0x102AA 4324 bytes

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