Malicious PDF — malware analysis report

Static analysis result for SHA-256 06cf118893f9b8c4…

MALICIOUS

PDF

75.2 KB Created: 2021-05-04 07:44:34 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: ac35efdfeab8f8dbdee91c537f67a323 SHA-1: 3481501538e5a51303613d19c2007343f384552b SHA-256: 06cf118893f9b8c42d5b13128ada4cc16c8bd7cd3b2645775a06a8a46a47251d
156 Risk Score

Malware Insights

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

The PDF file contains a large number of external links, many of which are obfuscated or lead to potentially malicious domains, indicating a link farm or phishing attempt. The presence of a critical heuristic for PDF SEO link farm and ClamAV detection as Pdf.Phishing.Trojan strongly suggests malicious intent. The primary IOC is the URL used in the link farm, which is designed to deceive users into clicking it.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9995

Heuristics 5

  • 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
  • External URI info PDF_URI
    PDF contains an external URL action
  • 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://fokemale.ru/strik?utm_term=hot+springs+sovereign+spa+price
    • https://cdn-cms.f-static.net/uploads/4445320/normal_602e4b1946974.pdf
    • https://cdn.sqhk.co/vitimosugu/hc4Mhcj/gajexojaruligozonudife.pdf
    • https://static.s123-cdn-static.com/uploads/4374978/normal_5fffb20cdb1a0.pdf
    • https://cdn.sqhk.co/dajebala/hgSHngc/heart_pump_model_project.pdf
    • https://static.s123-cdn-static.com/uploads/4460966/normal_6004b7efc7a38.pdf
    • https://cdn.sqhk.co/xoxamomajil/geiagiU/defina.pdf
    • https://cdn-cms.f-static.net/uploads/4481422/normal_606a24ddb9208.pdf
    • https://cdn-cms.f-static.net/uploads/4425504/normal_5fdbe0c3c9d77.pdf
    • https://cdn.sqhk.co/pigalixow/hdAoXjj/sixeduzewisu.pdf
    • https://cdn-cms.f-static.net/uploads/4446915/normal_601473b59d02e.pdf
    • https://cdn.sqhk.co/logubaxe/afhglUl/oscar_awards_2017.pdf
    • https://static.s123-cdn-static.com/uploads/4501029/normal_5ff600c8e51ed.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://f608bf75-187c-4b28-9621-af925c05c2b6.filesusr.com/ugd/05e3ad_5f0c35b2232545b2bc7778d3fb6ece1e.pdf?index=true
    • https://8c285b57-3156-47ce-881b-df665acc117b.filesusr.com/ugd/8d46c2_cced4892fffe42f7a69523d5f8495e32.pdf?index=true
    • https://1e16da7b-5b4f-4122-a3c4-5c88c9d97cf7.filesusr.com/ugd/83f04e_5376d42fdc6f496ea8bfb6b11dd434d1.pdf?index=true
    • https://bef89f6e-6323-4b84-ad9d-a44490bfcc4f.filesusr.com/ugd/96768c_790be3e78d91454084e2bdb9690ca8f9.pdf?index=true
    • https://58960a86-a3f4-42d8-866e-ee2cf32068b1.filesusr.com/ugd/1ad962_5a1cec493ae140f6b63f8e278ed6f793.pdf?index=true
    • https://ba9dc33f-61c2-415e-8598-c57272458a21.filesusr.com/ugd/c05727_6c407e4b85e345278ba4a04b147ad548.pdf?index=true
    • https://39c10a3a-92c6-412a-a1bb-b8a1fc48fbc4.filesusr.com/ugd/259099_e4fe49bf0cb140bbb3eb968ea1e0370d.pdf?index=true
    • https://911f1565-2faa-4874-b261-330d521e7362.filesusr.com/ugd/f46427_b73a0a5fc4f44e1591faab831dcea36c.pdf?index=true
    • https://13fad4bf-7224-44b3-802b-16842e97d241.filesusr.com/ugd/b14664_ee96ea00b6c6419ca21572d181958763.pdf?index=true
    • https://f0198b83-f3fe-41b4-8315-bacd7eabb238.filesusr.com/ugd/2b3f46_d2948f34d2214b12afe2d312e32e2796.pdf?index=true
    • 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_off0000e38e.bin
8ad36fd458914fd21e49f794de7041b5604ddc5f23c1e3408e3324d57fa506d0		 pdf-font-stream PDF embedded font (sfnt) at offset 0xE38E 5088 bytes
font_01_sfnt_off0000f4f5.bin
d47e06dbae730c256141fbc0b52819459c680e6b2ed1d105129ba52552ae91d6		 pdf-font-stream PDF embedded font (sfnt) at offset 0xF4F5 12012 bytes

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