Malicious PDF — malware analysis report

Static analysis result for SHA-256 282be3ed41055dfc…

MALICIOUS

PDF

70.2 KB Created: 2020-12-19 06:24:01 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 1d5c3a3373c9c5468ef764004ba081b0 SHA-1: 15209ffc16076d0dcdf49582f2e9b263e39332ad SHA-256: 282be3ed41055dfcc6b90faba25fa9ffa755323a3d385909518b936e98a7b2e7
214 Risk Score

Malware Insights

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

The PDF contains a link to a known malicious redirector, indicating an attempt to lead the user to a malicious site. The heuristic firings, including 'PDF_MALICIOUS_REDIRECTOR_LINK' and 'ML_NYX_PDF_MALICIOUS', strongly support this assessment. The document body, though heavily obfuscated, appears to be a lure related to sports channels.

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-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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=bright+house+sports+channel+guide
    • https://static.s123-cdn-static.com/uploads/4418574/normal_5fdd7da543f8b.pdf
    • https://kexexetipo.weebly.com/uploads/1/3/4/8/134897314/7541013.pdf
    • https://wedagibawarog.weebly.com/uploads/1/3/4/6/134680751/mawoderebab.pdf
    • https://zazusixalug.weebly.com/uploads/1/3/4/4/134491239/pupilesali.pdf
    • https://mujurusema.weebly.com/uploads/1/3/4/8/134846640/4015750.pdf
    • https://cdn-cms.f-static.net/uploads/4472486/normal_5fb4a8d939ce2.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://s3.amazonaws.com/risisipajole/ajcc_cancer_staging_manual_8th_edition_thyroid.pdf
    • https://s3.amazonaws.com/buwosevax/hpu_login_rusa_date_sheet.pdf
    • https://s3.amazonaws.com/xovajukoxin/8816227938.pdf
    • https://uploads.strikinglycdn.com/files/52c729e5-84c7-4562-86d4-47715f4a0cac/49280899464.pdf
    • https://uploads.strikinglycdn.com/files/43499e2b-c454-49a3-b911-545e034815d2/48265713494.pdf
    • https://s3.amazonaws.com/xanebavifamopez/josazifil.pdf
    • https://s3.amazonaws.com/rebesudanolo/ridoxesif.pdf
    • https://s3.amazonaws.com/gosete/kibewakonojulewatusefuvi.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 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000d510.bin
63514c5183d6b3e537200a5b352878f2c4b8515ca14d0a2ecf24a0357c20209e
pdf-font-stream PDF embedded font (sfnt) at offset 0xD510 5384 bytes
font_01_sfnt_off0000e757.bin
e578f40da9fbeff1478427a7c5c77f2cd1aaab0a3ba4896d6319ee9754701ad3
pdf-font-stream PDF embedded font (sfnt) at offset 0xE757 10768 bytes