Malicious PDF — malware analysis report

Static analysis result for SHA-256 e0fd89489784ffdf…

MALICIOUS

PDF

104.1 KB Created: 2021-03-31 12:09:38 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-07-02
MD5: 05e696871b7bc5a42afe9366d05560b3 SHA-1: 32a143a6e79d07ca36858ecb28af1c0516b44fab SHA-256: e0fd89489784ffdf987be82c823c9c910680ce906e666d2f67010dcb334ebb5f
126 Risk Score

Malware Insights

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

The sample is a PDF document that contains numerous embedded URLs, with one specifically identified as a malicious external URI. The ML classifier and ClamAV detection strongly indicate malicious intent, likely phishing or malware distribution. The document body, though heavily obfuscated, appears to be a lure related to a book title, aiming to trick users into visiting the malicious URL.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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/award?keyword=beware+of+dog+roald+dahl+pdf PDF link annotation
    • https://cdn.sqhk.co/dizoketa/YsoYVa7/27787579645.pdfIn PDF document text
    • http://menegatuje.iblogger.org/80737914526.pdfIn PDF document text
    • https://cdn.sqhk.co/nodewanase/gjifjcm/32700212977.pdfIn PDF document text
    • http://fekevopimibun.sportsontheweb.net/vokemozalozudaraje.pdfIn PDF document text
    • http://povisowalikim.scienceontheweb.net/juzagema.pdfIn PDF document text
    • http://loneresel.mygamesonline.org/bazigar_novel_download.pdfIn PDF document text
    • https://cdn.sqhk.co/medijuret/dF51nif/ditep.pdfIn PDF document text
    • http://gefosezidubajoz.scienceontheweb.net/34169212777.pdfIn PDF document text
    • http://kokolonesafu.getenjoyment.net/gasutaxapogiwuti.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://ca3ec1ac-6ff7-4c8f-ae0f-86a30d86e335.filesusr.com/ugd/3615fb_5888992848c644e6a2b8acb4925e32ca.pdf?index=trueIn PDF document text
    • https://92fbd7ca-8480-4723-bb2c-19523f9dca15.filesusr.com/ugd/29946e_39925828a34e40b7a8ff25f1de4776fa.pdf?index=trueIn PDF document text
    • http://satuwegalenez.epizy.com/xofokijavonolu.pdfIn PDF document text
    • https://367e539a-c541-4439-991c-4bf2bef2aa7a.filesusr.com/ugd/77d535_04b18c3714ab40c9966c0cecdd159876.pdf?index=trueIn PDF document text
    • https://933527c5-e005-4225-a3aa-05fee46c7696.filesusr.com/ugd/b51dd5_c008e82f9a244759874eede150acd323.pdf?index=trueIn PDF document text
    • http://bewebumaxof.epizy.com/lagu_bass_test_feel_the_bass.pdfIn PDF document text
    • http://fabonek.rf.gd/xisezesaxuzabulivojog.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_off0001563a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1563A 5264 bytes
SHA-256: 710554241872e46e95759735151db6b2dc9daa6d7d7cb98464f1a3e1f21a9e2d
font_01_sfnt_off00016836.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x16836 12948 bytes
SHA-256: 8c66b2a08b6a9bd225be44c0e43eeb99b5d2a39abcfce61941dabecc4a31cb3a

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