Malicious PDF — malware analysis report

Static analysis result for SHA-256 47a23c556cd8ce8e…

MALICIOUS

PDF

75.9 KB Created: 2021-04-01 05:27:36 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 92ca698b35f037493a28bb4c2b0dbad1 SHA-1: ed263aac1387b1f32fd5539bf5bb4f5cc1dab817 SHA-256: 47a23c556cd8ce8e7cad75253e5f3a67a1d1b70b33b47738e819498dcfeefa30
156 Risk Score

Malware Insights

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

The PDF file contains numerous external links, many of which are part of a link farm designed to appear as search results for various topics, including "understanding world societies volume 2 pdf download". This suggests a phishing or SEO poisoning attack. The ML classifier and ClamAV detection strongly indicate malicious intent, likely related to phishing or distributing malware.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

Heuristics 5

  • 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.
  • 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://mezovuduw.ru/wix?keyword=understanding+world+societies+volume+2+pdf+download
    • https://cdn.sqhk.co/vugomupuzisa/uX3geMt/multiplayer_word_games_for_pc_download.pdf
    • https://japapitamamevoj.weebly.com/uploads/1/3/2/7/132740309/1337878.pdf
    • https://vilujelirajoki.weebly.com/uploads/1/3/4/3/134378771/nisafatipev_wibuvidijoto_voxupozi_ravuper.pdf
    • https://vudefuzafovafid.weebly.com/uploads/1/3/4/6/134630521/4363486.pdf
    • https://boxepupobitu.weebly.com/uploads/1/3/4/5/134587113/8857760.pdf
    • http://bumufirila.mygamesonline.org/bupirasubazeti.pdf
    • https://cdn.sqhk.co/saboretiki/jnjjhbM/earn_to_die_2_exodus_unblocked_games_66.pdf
    • https://sakavikonur.weebly.com/uploads/1/3/4/8/134854141/lopogofidowaforigobi.pdf
    • http://lawexape.mygamesonline.org/gigajudusenijofukutivel.pdf
    • http://mavogevuz.getenjoyment.net/momorilavomomit.pdf
    • https://cdn.sqhk.co/foropogajag/gtTo9np/kopamolojugejozup.pdf
    • http://rarubife.mygamesonline.org/temozavivewet.pdf
    • https://surigogalabilix.weebly.com/uploads/1/3/5/9/135961506/wotiwe-vizajarulasir-tirak.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://uploads.strikinglycdn.com/files/19e797c5-287b-4156-a186-b54bf0da31a6/kutaligixof.pdf
    • https://uploads.strikinglycdn.com/files/cfecc2cf-6a31-4961-950d-0904de24e2e6/crear_hoja_de_vida_sencilla.pdf
    • https://uploads.strikinglycdn.com/files/3fab9217-1dc0-498c-b0e9-f4bfc104cf68/90326751592.pdf
    • https://uploads.strikinglycdn.com/files/f30165cc-680f-46b1-823d-085d9f8aff84/rezuvazagad.pdf
    • https://uploads.strikinglycdn.com/files/cbacfdd7-1456-4fb6-bb2e-484089de5c6a/materia_y_energia_en_ecosistemas.pdf
    • http://sofibimibojas.myartsonline.com/demajuranugo.pdf
    • https://uploads.strikinglycdn.com/files/a5e3a8b1-b6ef-49f3-a436-596ec6967ec1/best_stock_trading_tips_for_beginners.pdf
    • https://uploads.strikinglycdn.com/files/63d7e050-0fcc-4060-9102-642b638ec4d8/what_does_it_mean_to_dream_holding_a_baby_boy.pdf
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/
    • http://scripts.sil.org/OFL

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e8f7.bin
9bd535e166c00fee7556e383559124fe8bab5624ac89a7b7f1ab00908400167d		 pdf-font-stream PDF embedded font (sfnt) at offset 0xE8F7 5748 bytes
font_01_sfnt_off0000fc92.bin
e415173cb00a0ed3c534c02943c5fab67d8edfb3713b6f07c1311691b4acfc64		 pdf-font-stream PDF embedded font (sfnt) at offset 0xFC92 10940 bytes

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