Malicious PDF — malware analysis report

Static analysis result for SHA-256 a3ab723113bc4e05…

MALICIOUS

PDF

77.5 KB Created: 2021-01-05 19:01:59 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-22
MD5: 3df8b9d09093d894ec7a60af589b9576 SHA-1: 9ff0cc556f0233d80099f6eb572e6b559fa31127 SHA-256: a3ab723113bc4e051392eb2e58e49d0ffa3b69efc96d05ee0f0bc579f305c996
214 Risk Score

Malware Insights

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

The PDF contains embedded links and text that attempt to trick the user into downloading a modded game, which is a common lure for malware. The heuristic firings indicate the PDF links to known malicious redirectors and is part of a link farm, suggesting a phishing or malware distribution campaign. The ML classifier and ClamAV detection strongly indicate malicious intent.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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.
  • 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://traffking.ru/wb?keyword=battlelands%20royale%20mod%20apk%202.%206.%201 In PDF document text
    • https://tanatomunedasov.weebly.com/uploads/1/3/5/3/135325499/9ce8d45557802.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4466143/normal_5fb55efc1f659.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4381547/normal_5fb29f8027a7b.pdfIn PDF document text
    • https://zosupexaduj.weebly.com/uploads/1/3/0/7/130738593/rudixeja.pdfIn PDF document text
    • https://wajirabipuxu.weebly.com/uploads/1/3/0/8/130874591/ladiden.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4379603/normal_5f8c84211d106.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4372360/normal_5fe6a28415a80.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/welanisowari/torurojifakogovalezuzer.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/106f5911-cd99-4c90-84cd-8808a8ec03cf/wivelugunomotidotazabe.pdfIn PDF document text
    • https://s3.amazonaws.com/rejiner/broadlands_primary_school_hereford_ofsted_report.pdfIn PDF document text
    • https://s3.amazonaws.com/dukajevo/memorial_service_template_uk.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_off0000e40f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE40F 5688 bytes
SHA-256: 6810e379cd716580d9e63caeae4c15e18ca0f1b872c690a368b228e268d4e117
font_01_sfnt_off0000f766.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF766 22744 bytes
SHA-256: 248fe7c50b99bdba8c82cc219ed8c5780a1d93e0f8b05cc732d1e6e6e2c5db59

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