Malicious PDF — malware analysis report

Static analysis result for SHA-256 9b8ae8947d86a658…

MALICIOUS

PDF

70.9 KB Created: 2021-01-01 21:04:55 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-12
MD5: 1411102d8602a6a136e1c57784b3c81c SHA-1: b3e1cca1186c626f8d4f29dbc6f1ab9f0df611b7 SHA-256: 9b8ae8947d86a6581f2be66eb9ccc0a001ff11876e1b9c77bf30c8fabb7606cf
214 Risk Score

Malware Insights

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

This PDF file contains numerous links to external websites, including a known malicious redirector. The heuristic firings indicate it is part of a link farm designed to direct users to malicious infrastructure. The ML classifier and ClamAV detection strongly suggest malicious intent, likely for phishing or scamming purposes.

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
  • 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/123?utm_term=mass+state+retirement+chart+group+2 In PDF document text
    • https://static.s123-cdn-static.com/uploads/4418556/normal_5fdf2f345eb9c.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4490961/normal_5fdbe9838b504.pdfIn PDF document text
    • https://cdn.sqhk.co/potasuregoz/chdifhb/evil_alien_in_dragon_ball_z.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4365998/normal_5f86ffafe31f4.pdfIn PDF document text
    • https://numeroluxovuz.weebly.com/uploads/1/3/4/7/134733954/2181050.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4485014/normal_5fc47bc7bc83b.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366041/normal_5f875a9416153.pdfIn PDF document text
    • https://fiwisito.weebly.com/uploads/1/3/4/7/134715438/wetetemozesumaline.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4414357/normal_5fb629191bd4b.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/b56bb859-d1e8-40a0-aafc-02107cc57fc1/41137298333.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/8d12ef5f-8310-4be3-8150-1d25262fa8da/trailer_tool_boxes_at_tractor_supply.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/e79ae258-6b27-4c25-ac11-b52a6234c3f0/16818694286.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/e6ba62ae-6fe8-4d23-b82f-8f15f99d350d/97087442513.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/372baad0-2c5b-4b15-954b-149f7a4a1e57/mevinakavaxunigubezofif.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_off0000d70c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD70C 5452 bytes
SHA-256: e7c485f01af9f4c5055b41cfdcdf38e7aebeff847df5d6afd8a0b98ef9d240ab
font_01_sfnt_off0000e97d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE97D 10892 bytes
SHA-256: 3abaf7d89c93f04214bfb19a4d333e803f5bbad9513b95774ab207db3f2053d9

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