Malicious PDF — malware analysis report

Static analysis result for SHA-256 d0f996b144b3da3d…

MALICIOUS

PDF

81.9 KB Created: 2021-03-17 00:59:47 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-08-20
MD5: 52d8f527bb580e1e821b4d882b30c365 SHA-1: c997baa17644f1f4ee701c31b7d4271533867a4e SHA-256: d0f996b144b3da3d4ae1899da9fe801c36b4bd456449107830ba99cf1c2f2831
126 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

The PDF contains numerous embedded URLs, with one prominent URL leading to a domain associated with phishing activity. The ML classifier and ClamAV detection strongly indicate malicious intent. The document body, though heavily obfuscated, appears to be a lure related to a game guide, aiming to trick users into visiting the malicious link.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9994

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://resalured.ru/123?utm_term=dragon+age+inquisition+cassandra+conversation+guide PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4480748/normal_60328b33d2656.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4370528/normal_60215c172208d.pdfIn PDF document text
    • http://xugaguf.mypressonline.com/renewasidotejimo.pdfIn PDF document text
    • http://tusiteguluvora.getenjoyment.net/distress_tolerance_techniques.pdfIn PDF document text
    • http://pakupuxojopef.getenjoyment.net/adjective_degrees_of_comparison_exercises.pdfIn PDF document text
    • http://makelemeg.mygamesonline.org/33467464665.pdfIn PDF document text
    • http://fazurusitu.getenjoyment.net/bugiviwifananusubajiweri.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366408/normal_6048aab77cc4b.pdfIn PDF document text
    • http://tufofol.medianewsonline.com/mifonijoneriturefenu.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4417806/normal_5fcff15d8b3bb.pdfIn PDF document text
    • http://pawomodom.medianewsonline.com/tiwenafuru.pdfIn PDF document text
    • http://surupumigo.mypressonline.com/vinawonagafiridozuxo.pdfIn PDF document text
    • https://cdn.sqhk.co/runenuti/bjbgcig/interstellar_soundtrack_deluxe_vinyl.pdfIn PDF document text
    • https://cdn.sqhk.co/kewawukufiju/j2zNXsW/if_else_if_in_rtf_template.pdfIn PDF document text
    • https://cdn.sqhk.co/zewezerezi/chhewBx/merirojojovamawoginabeja.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://d4508431-0eee-4913-ac2a-2ec907ed9b18.filesusr.com/ugd/12daa7_87f89c7f830940259b17ab005a9cc421.pdf?index=trueIn PDF document text
    • https://73af689e-4c80-4f62-99d3-7a886641ad81.filesusr.com/ugd/3b5dd9_a56e216fbf0a49429b512e3f22623afc.pdf?index=trueIn PDF document text
    • http://gixopiv.onlinewebshop.net/59034528526.pdfIn PDF document text
    • http://nifusotajezunur.atwebpages.com/3405646378.pdfIn PDF document text
    • https://3c8d80e7-2998-4b53-b1db-ea2053e4eee2.filesusr.com/ugd/5c8c55_d84ea32de0594c8c898a97e1a9320b3f.pdf?index=trueIn PDF document text
    • https://3df06c22-1e8a-4082-8cc2-a0fdc0609706.filesusr.com/ugd/d86e81_d44bb65d1275402bb5d6faa680c9c3e1.pdf?index=trueIn PDF document text
    • https://dec4a425-646e-450a-80ca-a73a75d058ad.filesusr.com/ugd/ba3095_d44b88240de548ec905e8b083e8436bd.pdf?index=trueIn PDF document text
    • http://pudugivifo.myartsonline.com/new_english_file_oxford_beginner.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_off0001024f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1024F 5260 bytes
SHA-256: 009eb2f543e72f9e4416cfbad97d4210fc5a54ae4a954226d48d49fe29e71242
font_01_sfnt_off00011440.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11440 11000 bytes
SHA-256: 7a7dd5f202334be0530868ce08e67d55800b5d69584d244de9d99346e012f21f

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