Malicious PDF — malware analysis report

Static analysis result for SHA-256 9e6ba9013ae32144…

MALICIOUS

PDF

77.9 KB Created: 2021-03-17 17:14:02 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-23
MD5: e1e7b8d117b66c5785eba1edc73a077e SHA-1: 94508936d2882ff90e498febdf445ded32ad24b7 SHA-256: 9e6ba9013ae3214487d700719a46beff1f2aa6b2f90a95d00f95a4d71c9d1bb7
186 Risk Score

Malware Insights

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

This PDF document was flagged as malicious by ClamAV and an ML classifier. The file embeds a large number of external links characteristic of an SEO link farm. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9991

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://dugedepap.ru/award?keyword=keto+diet+guide+pdf PDF link annotation
    • https://sasofisapen.weebly.com/uploads/1/3/4/5/134590640/xutelu-muvawirul.pdfIn PDF document text
    • https://pusixeraz.weebly.com/uploads/1/3/2/6/132681440/0b31a.pdfIn PDF document text
    • https://cdn.sqhk.co/wokiwife/ggthe5o/5322365318.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4450511/normal_604cd866d0046.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4403959/normal_5ff4fca4c3a3b.pdfIn PDF document text
    • https://cdn.sqhk.co/jujirepak/2BgcheE/adobe_photoshop_express_fotos_y_collages_apk.pdfIn PDF document text
    • https://kenomuxi.weebly.com/uploads/1/3/4/0/134042647/waboda.pdfIn PDF document text
    • https://mikazeral.weebly.com/uploads/1/3/2/3/132303371/0f2550.pdfIn PDF document text
    • https://cdn.sqhk.co/labojime/eOFgcib/arijit_singh_songs_download_mp3_bestwap_2020.pdfIn PDF document text
    • https://cdn.sqhk.co/vefomatakin/shbggwR/metal_boyas_alt_n.pdfIn PDF document text
    • http://pezisafepogux.22web.org/revezagodezirurawomonovun.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://tuzikarowom.epizy.com/caracteristicas_del_movimiento_rectilineo_uniforme_en_fisica.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/d371bb2c-7b87-4e35-ba38-71945d799975/laughing_buddha_bookends.pdfIn PDF document text
    • https://b81e1767-bb0d-4562-9f98-cfef66859bb1.filesusr.com/ugd/b48b60_c0dc6469860446828d6838138a52c60c.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/6ad9b681-9a92-4211-a3d4-3463e026abf6/wolujetekalamibetiwitom.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/cc16db7b-3f4f-4ce3-b91c-754a107181c5/mijapisilo.pdfIn PDF document text
    • http://jizabimumonox.rf.gd/72853019529.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/44e0198e-752e-42de-8dc1-54a5f211fc84/super_mario_land_dx.pdfIn PDF document text
    • https://bef89f6e-6323-4b84-ad9d-a44490bfcc4f.filesusr.com/ugd/96768c_3414a513d4cc480fb97d88cb9d2fa40e.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/90db3e80-fe10-40f7-9a53-3141ebc6942c/sutezututexufel.pdfIn PDF document text
    • https://23751d96-d7b3-42ca-b8ca-e459b671ea95.filesusr.com/ugd/7de994_d06aa870f7b447119b3d244e3e031d98.pdf?index=trueIn PDF document text
    • http://bekovomojuto.epizy.com/directional_terms_worksheet_answers_anatomy_and_physiology.pdfIn PDF document text
    • https://c83cbd6e-a134-4b49-ba12-49f24c654ad9.filesusr.com/ugd/904a8b_7d008d1aa8bf48a1b1b1f5ff25b69ace.pdf?index=trueIn PDF document text
    • https://275320ff-96dd-455a-9699-a0fdc58b27a5.filesusr.com/ugd/943725_3fed0ae9785b401fb7ffd14da5ae84b1.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_off0000f523.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF523 4664 bytes
SHA-256: a2ed9579643a9d732064a4ea4d783591759a6047baa20ee012c39e5c56ad538a
font_01_sfnt_off00010526.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10526 10828 bytes
SHA-256: f5307fa33ac788c2a8db3a04f4a88e81fd0ef7743e342e23bb885976bf63ade4