Malicious PDF — malware analysis report

Static analysis result for SHA-256 ada0344645660dd1…

MALICIOUS

PDF

92.6 KB Created: 2021-02-15 20:52:04 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-23
MD5: 3e9e2baacd1cc48436a530f023f26cf3 SHA-1: 7b5615bf6e2bd82c222a433e4d53a3ee78bb280a SHA-256: ada0344645660dd172f26291175286570570f5c56fcfcab6b2c872e3e8d00b25
184 Risk Score

Malware Insights

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

The PDF contains embedded links that point to known malicious redirector infrastructure, as indicated by the PDF_MALICIOUS_REDIRECTOR_LINK heuristic. The sample is also identified as a link farm on disposable hosting, suggesting an attempt to obscure the final destination. The ML classifier and ClamAV detection further confirm its malicious nature, likely serving as a lure to a phishing or malware distribution site.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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 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.
  • 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://yafferge.ru/123?utm_term=the+48+laws+of+power+by+robert+greene+animated+book+summary+-+all+laws+explained In PDF document text
    • https://cdn-cms.f-static.net/uploads/4483346/normal_5fd14588645ae.pdfIn PDF document text
    • http://jamedoxeka.22web.org/vipejasegonogotesowel.pdfIn PDF document text
    • https://cdn.sqhk.co/jumifokujuje/Bhh74Cu/28997939055.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4476593/normal_5fdf25ffc1a1b.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4448542/normal_60275a420c468.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4444864/normal_5fd05eb40c2b9.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4413474/normal_6022d878bba0b.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4491969/normal_602708ad49100.pdfIn PDF document text
    • http://xofenejilomoz.iblogger.org/39078802301.pdfIn PDF document text
    • http://wisopenudaris.22web.org/just_shapes_and_beats_game.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://xenemusexo.epizy.com/process_validation_master_plan_template.pdfIn PDF document text
    • http://botemexake.rf.gd/46430531535.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_off0001289a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1289A 6184 bytes
SHA-256: 1da6b44cd7b96a94bb5dd884f55e7f364662f7b473bf3abccc9b32fd8be279bf
font_01_sfnt_off00013d9d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13D9D 10628 bytes
SHA-256: 879bd46b7f5d2386286eef2e1dd7846240eb4896f19096a08a95dd2b7ff46c13

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