Malicious PDF — malware analysis report

Static analysis result for SHA-256 d7b17469083c4982…

MALICIOUS

PDF

78.7 KB Created: 2021-05-03 23:04:08 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-14
MD5: fd5ce826d27f8c90215ea2fecea74022 SHA-1: 83d88801cf5b12b536b69e24017ce50c1f2d5fe4 SHA-256: d7b17469083c4982d32cc8b1a2ddeb40e3b9813a19e9a609cd863485b04a1145
96 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

The file is identified as malicious by ML classifiers and ClamAV, with a high risk score. It contains an embedded URI pointing to a suspicious domain, which is a common tactic for phishing or distributing further malware. The document body, though heavily obfuscated, contains metadata suggesting it was generated by wkhtmltopdf, a tool sometimes used to create malicious PDFs.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9991

Heuristics 4

  • 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://xezojetit.ru/strik?utm_term=cloudy+with+achance+of+meatballs+characters+names PDF link annotation
    • http://xidotamasaw.22web.org/jonurozoligekigolomugi.pdfIn PDF document text
    • http://takovevagagiv.scienceontheweb.net/difikuxakomidemalobufokub.pdfIn PDF document text
    • http://zetumitufam.mywebcommunity.org/39427456642.pdfIn PDF document text
    • http://nokiwurugibub.mypressonline.com/luxubixo.pdfIn PDF document text
    • http://wuzulosijeg.22web.org/skyrim_npc_creation_kit.pdfIn PDF document text
    • http://polobasopika.mywebcommunity.org/geronimo_stilton_saison_1_episode_2.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/jugobimuraje/oraciones_en_ingles_en_pasado_continuo_con_verbos_irregulares.pdfIn PDF document text
    • https://s3.amazonaws.com/vexeliku/joxegogelomipesodebob.pdfIn PDF document text
    • https://s3.amazonaws.com/warapagefasovi/kebitalaxoganaperim.pdfIn PDF document text
    • https://s3.amazonaws.com/xupizewuxere/activator_microsoft_office_plus_2010.pdfIn PDF document text
    • https://s3.amazonaws.com/falevi/86441436747.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/68ea0e0e-612b-4fe3-a8d1-381cce466779/zusedawu.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/da5286b3-b436-4164-b3aa-ac1d12459e1d/23053889294.pdfIn PDF document text
    • https://s3.amazonaws.com/risalenefazozo/creo_parametric_5_tutorial.pdfIn PDF document text
    • http://najijojovigom.myartsonline.com/68721330830.pdfIn PDF document text
    • http://lebikefexiza.epizy.com/vusuvuniravituxorasa.pdfIn PDF document text
    • https://s3.amazonaws.com/zolerazowubow/didogabuselozowoje.pdfIn PDF document text
    • https://s3.amazonaws.com/defipedibe/southern_california_offshore_weather_report.pdfIn PDF document text
    • http://dibezage.epizy.com/fepufevusisarij.pdfIn PDF document text
    • https://s3.amazonaws.com/kosipefojaw/57878706476.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/3b33a781-b295-4faf-9e51-ef1723ac6d19/7580299927.pdfIn PDF document text
    • https://s3.amazonaws.com/viromibukoleliw/guided_by_voices_alien_lanes_lp.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/68ead623-6dcc-4c2d-876b-5b6ad3cf350f/47351197018.pdfIn PDF document text
    • https://s3.amazonaws.com/lupuvogotog/19200934098.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_off0000f60c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF60C 5500 bytes
SHA-256: e8065a8dcfa61559de716cc0cae32ed3605d6cc4c7dd67f3bbfd09c97b44978a
font_01_sfnt_off000108a9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x108A9 10468 bytes
SHA-256: 704f805c82b1dd4e8df1fe217fd175f82048a0bc54228dd4f69beefbf1c2dbfd

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