Malicious PDF — malware analysis report

Static analysis result for SHA-256 764eb6174e879a6f…

MALICIOUS

PDF

79.6 KB Created: 2021-05-11 09:09:46 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-25
MD5: 13511d20a4359434237c913948d35856 SHA-1: 479771a0618531c6a9083195b834c9d0a11bdd7c SHA-256: 764eb6174e879a6fed4cd5bc461c5b388dbb9297bdbd06d1cc60f500efed3e11
126 Risk Score

Malware Insights

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

The sample is identified as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. It contains an external URI pointing to a suspicious domain, likely used to host malicious content or phishing pages. The PDF structure and embedded content suggest it's designed to trick users into visiting this external resource.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

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://gimoguvi.ru/strik?utm_term=2000+honda+accord+v6+wheel+bolt+pattern PDF link annotation
    • https://static.s123-cdn-static.com/uploads/4445877/normal_5ffca2fbb2890.pdfIn PDF document text
    • https://cdn.sqhk.co/puvubuzu/ghWifZK/36670552566.pdfIn PDF document text
    • http://argo-tourism.com/likijukitozowub32v8u.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4387712/normal_6057ada9730a3.pdfIn PDF document text
    • http://kigalasabipigo.medianewsonline.com/gotebiduwigiberanubap.pdfIn PDF document text
    • http://vikiduxa.mywebcommunity.org/14284047910.pdfIn PDF document text
    • https://cdn.sqhk.co/puxolika/iijiijh/6179005595.pdfIn PDF document text
    • http://kasyanbeauty.com/914897392381gtnc.pdfIn PDF document text
    • http://my-favshoph.online/best_movie_quotes_of_all_time_reddit58yu2.pdfIn PDF document text
    • http://nubatevujonuw.mygamesonline.org/jowumuwopopelo.pdfIn PDF document text
    • http://nosinoski.shop/sofewumezagadelipijugs08g.pdfIn PDF document text
    • https://cdn.sqhk.co/madilaxetevo/hjjfBDH/compound_bow_target_arrows.pdfIn PDF document text
    • https://cdn.sqhk.co/bipukawu/ighfLgg/talking_animals_app_download.pdfIn PDF document text
    • http://sewonmedix.ru/programa_de_estudios_2011_tercer_grado_educacion_fisica67ykt.pdfIn PDF document text
    • http://nopuvobetag.mygamesonline.org/worulimux.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4392215/normal_603b2cc36b596.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://uploads.strikinglycdn.com/files/f0207901-3b7f-41cc-81c0-ca55d8fbec4a/dnd_5e_warlock_subclasses.pdfIn PDF document text
    • http://nejimafalun.onlinewebshop.net/85661616784.pdfIn PDF document text
    • http://fadudenomo.onlinewebshop.net/how_to_put_pictures_on_philips_digital_photo_frame.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/60377f92-69f1-468c-8a87-52351842307d/81615049508.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/d1da6af8-bdcf-44fc-a192-b42de254c079/jodonojig.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/4211b5d8-9074-49fc-9fc7-1f58c7ebe646/gusuwirakivawubir.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_off0000f920.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF920 5608 bytes
SHA-256: caf0475b160ff0cf9cce573955978afa0c1a78cb2bacd81cc9f459d2e3f384fe
font_01_sfnt_off00010c34.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10C34 10620 bytes
SHA-256: b9d85ba08c0d5b73ced5598c2e900c4cc38b871530f8f9905961db131bc61e92

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