Malicious PDF — malware analysis report

Static analysis result for SHA-256 dee1cef805d0958e…

MALICIOUS

PDF

75.2 KB Created: 2021-01-05 20:48:50 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-14
MD5: 6dd80070ae086f74bf2bd88bc89100ac SHA-1: e6ffacc686666aa207236db465ebbe66e997b2cb SHA-256: dee1cef805d0958e06e5f6579336d6c489a334215897f2d3ef600e447d80f9e6
126 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

This PDF document is classified as malicious, exhibiting characteristics of a phishing or scam attempt. It contains numerous embedded links, many pointing to disposable hosting services, designed to redirect users to potentially harmful content. The heuristic 'PDF_SEO_DISPOSABLE_LINK_FARM' specifically indicates a tactic of using a large number of links on disposable domains, likely for SEO manipulation or to obscure malicious destinations. While no scripts were extracted, the presence of many external URIs and the ML classification strongly suggest a malicious intent to redirect users.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9999

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
  • 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://traffking.ru/123?utm_term=algebra+2+test+pdf PDF link annotation
    • https://mavevataxivira.weebly.com/uploads/1/3/4/6/134600118/sikez_nusowufege_susalabalupe_petaxufi.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4454967/normal_5fcf207f76e3c.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4369522/normal_5fa73484f4213.pdfIn PDF document text
    • https://gepulepefuxogu.weebly.com/uploads/1/3/2/6/132683228/9022220.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4375199/normal_5fca8f1027948.pdfIn PDF document text
    • https://polirafula.weebly.com/uploads/1/3/4/5/134528493/3034682.pdfIn PDF document text
    • https://zadopelujon.weebly.com/uploads/1/3/4/8/134884154/miboxakazomux_lemepitap.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • https://uploads.strikinglycdn.com/files/dab59d74-9f52-497f-8c24-936907c62dac/fomopafuroxamamibikexebap.pdfIn PDF document text
    • https://s3.amazonaws.com/fixararololu/superlatives_exercises_esl_worksheet.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/b46b07f8-c770-41ad-b902-5d754631a314/tipujalegotan.pdfIn PDF document text
    • https://s3.amazonaws.com/tanapilamaxi/inputstream_to_byte_array_android.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000de6b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDE6B 4992 bytes
SHA-256: af3ee706f3df1dd04d200200eefbca0325a4eb7fc4263f86f8aeaf6cb7e50655
font_01_sfnt_off0000ef73.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEF73 10256 bytes
SHA-256: a26d0627d57b7781da3a61c3c45cae7ead7f053f901ba9f037fba2f39bf59c98
font_02_sfnt_off0001127e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1127E 4324 bytes
SHA-256: 4fcfa7c68d76e23b667942a3ac892d2d5d88346478daafc61479ad4df4af3dd3

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