Malicious PDF — malware analysis report

Static analysis result for SHA-256 f6d211b8779f4f11…

MALICIOUS

PDF

80.9 KB Created: 2021-03-23 05:57:16 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-07-02
MD5: 41728016ea3ef95bce7fd992907143f8 SHA-1: 17bb8f4baabbfcdeb39bb01165e80c5eaf7184a7 SHA-256: f6d211b8779f4f11e64939054aba86ac8663746d1c244aba928e2c97346b3c82
186 Risk Score

Malware Insights

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

The PDF document contains a large number of external links, many hosted on disposable domains, suggesting a link farm or phishing campaign. The ClamAV detection and ML classifier strongly indicate malicious intent, specifically a phishing or trojan distribution. The document body, though heavily obfuscated, contains keywords related to search terms, reinforcing the lure aspect.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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.
  • 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.
  • 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://xezojetit.ru/wix?keyword=phineas+and+ferb+magic+carpet+ride+youtube PDF link annotation
    • https://volorizog.weebly.com/uploads/1/3/1/0/131070051/8266181.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4482623/normal_60043ca5490af.pdfIn PDF document text
    • https://cdn.sqhk.co/rorefevobo/lMIjbgd/89164915501.pdfIn PDF document text
    • https://cdn.sqhk.co/xomorenut/MyR1jjk/wodomididadogedem.pdfIn PDF document text
    • https://cdn.sqhk.co/nuroteditu/jdhgidQ/puvuwowa.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4487632/normal_5fe102534d1d1.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4419412/normal_603f2bd0d2e87.pdfIn PDF document text
    • https://cdn.sqhk.co/ranemagesoga/clUchfB/integrated_camera_missing_from_device_manager_windows_10.pdfIn PDF document text
    • https://pofunowiri.weebly.com/uploads/1/3/3/9/133997400/3f7c871ee90182.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://8f6f9f04-f977-4239-955d-f6aecf2dd879.filesusr.com/ugd/81cd61_3b64a39bdfc448a6aa2a2070ec8eb9c1.pdf?index=trueIn PDF document text
    • http://muzirovun.epizy.com/present_perfect_tense_simple_past_tense.pdfIn PDF document text
    • https://84d51d8d-5932-465a-b044-5d36dace581c.filesusr.com/ugd/98e2de_87737d06ed904eb4b54eec673f15cbda.pdf?index=trueIn PDF document text
    • https://1c437d0a-cccb-4a8a-93f1-39e0b5126915.filesusr.com/ugd/b91566_ab16ac1349bc4998b6a5ce50f3fbe4e4.pdf?index=trueIn PDF document text
    • https://6f81cef9-66a2-447d-9e1d-4c0427ef15c5.filesusr.com/ugd/4d935e_e00a14eb5b904a2fb2b6d2946a9767b7.pdf?index=trueIn PDF document text
    • https://f62823ea-e863-4eb7-bd7c-e3bac0139ff1.filesusr.com/ugd/8c639a_f959c24b891a49448b9cbc9335a0bc22.pdf?index=trueIn PDF document text
    • http://jimulopipuxofom.rf.gd/devopozipiwiviferigifimi.pdfIn PDF document text
    • https://5efcf519-4c71-4be9-a00f-e1d47ba804c5.filesusr.com/ugd/ebcc4b_6826f612b3074b8496e7ac8973224dc5.pdf?index=trueIn PDF document text
    • https://07d68bf2-0661-47e2-9ffe-eae068a071af.filesusr.com/ugd/fef806_e71bbc439a334cfe92ca3bca93d0f97e.pdf?index=trueIn PDF document text
    • https://0dc5016f-38c0-4e11-84f4-4717e3ef4ec7.filesusr.com/ugd/4fd84c_96758e48bc704ba3b8ce533de1408176.pdf?index=trueIn PDF document text
    • https://bcd7deca-fd5d-492b-a220-d373ca515bc9.filesusr.com/ugd/12f4eb_d58ca0be64f94e66bec47b63b6ab3c7d.pdf?index=trueIn 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_off0000fc8b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFC8B 5780 bytes
SHA-256: 3a5e65228e90f2ad9a66ff882220197cbbc6e6b7519bea57b8eea27f0830a40b
font_01_sfnt_off0001101d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1101D 11244 bytes
SHA-256: 6d513a62107feaf2ec4825eef769a2eac6d07dd76c758d139bf489f70fd0f4b8