Malicious PDF — malware analysis report

Static analysis result for SHA-256 30950e877d7b2e37…

MALICIOUS

PDF

77.2 KB Created: 2021-04-30 14:56:24 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: a77cf80a9a6d4816af270ed9ac21c39a SHA-1: 585d060874898b84e1981b0bd54cf35841888804 SHA-256: 30950e877d7b2e3769e1cac4c84ed29ba7e706363b479ced670bf4ac096d9e96
156 Risk Score

Malware Insights

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

The PDF contains a large number of external links, identified by the PDF_SEO_LINK_FARM heuristic, suggesting a link farm or phishing attempt. The ML classifier and ClamAV detection strongly indicate maliciousness. While no scripts were explicitly extracted, the presence of numerous external URLs points towards a malicious intent to redirect users to potentially harmful sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9993

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-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://druttle.ru/strik?utm_term=nato+alphabet+germany
    • https://jonusozulat.weebly.com/uploads/1/3/4/5/134523624/wavupigaxafu.pdf
    • https://cdn.sqhk.co/buruvalufe/f3mZje2/online_shooting_games_pc_free_play.pdf
    • https://cdn.sqhk.co/wixexozesila/ktIRghk/smash_mouth_all_star_video.pdf
    • https://cdn.sqhk.co/pozuwifofub/fL7heuf/melizogiratex.pdf
    • https://bimuxafidiw.weebly.com/uploads/1/3/4/7/134701061/8918051.pdf
    • http://gesetaxoxu.sportsontheweb.net/18041330408.pdf
    • http://kirudikegopoded.sportsontheweb.net/95526432864.pdf
    • https://cdn-cms.f-static.net/uploads/4479715/normal_60646596d5575.pdf
    • https://wuzezabor.weebly.com/uploads/1/3/1/4/131438899/377fa2dbc5.pdf
    • https://cdn-cms.f-static.net/uploads/4388405/normal_600d47380ee5d.pdf
    • http://pemeturaw.iblogger.org/80785110237.pdf
    • https://static.s123-cdn-static.com/uploads/4403543/normal_6006bc43a521e.pdf
    • https://tedofejufada.weebly.com/uploads/1/3/0/7/130775935/majixopevu.pdf
    • http://goxivomibivufuv.mywebcommunity.org/anodea_judith_wheels_of_life.pdf
    • https://fijuxibafituwu.weebly.com/uploads/1/3/4/1/134109117/jopatuvalujaw_jevesan_borivadexanem_jozef.pdf
    • https://cdn.sqhk.co/vurelakixu/ijhcShb/zofusi.pdf
    • https://cdn.sqhk.co/pawexedibib/aqL8pAU/wegag.pdf
    • https://static.s123-cdn-static.com/uploads/4449604/normal_5fe5b86e33c01.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://lelefabopotudox.rf.gd/castrol_edge_0w-_40_data_sheet.pdf
    • https://229c3593-bb94-4e5d-9b9f-ca3747df48ef.filesusr.com/ugd/145364_5d3630ee584f4dfeb30944ca2e858eac.pdf?index=true
    • https://83d12552-0bc1-4415-b221-1da25caacb9b.filesusr.com/ugd/1e11d0_353a4c1a9e994e4e9a037157bbabe487.pdf?index=true
    • https://2489a575-72f7-492f-b117-28cfe4a4d2a3.filesusr.com/ugd/d81705_c9b53e7b7d034b1ca1f8206c55cdbd70.pdf?index=true
    • http://vilatelisoto.onlinewebshop.net/web_to_converter_chrome_extension.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_off0000f0ba.bin
4b3703313eb1ab4db2b33e119c5fa35efe9a82ae05d872c7efc3e1af233eeeb3		 pdf-font-stream PDF embedded font (sfnt) at offset 0xF0BA 5264 bytes
font_01_sfnt_off00010282.bin
9218ca567346c7a2fa24b9b46582d69f62e70663efa8bebe5874a1151749bc1f		 pdf-font-stream PDF embedded font (sfnt) at offset 0x10282 10948 bytes

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