Malicious PDF — malware analysis report

Static analysis result for SHA-256 c0769e97c19991b3…

MALICIOUS

PDF

99.8 KB Created: 2021-01-17 19:20:38 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-12
MD5: 91bd2a238cfa5c80fca6e55114fccedb SHA-1: 75d2497d6d7926029dd9938cbb05c2b581760c37 SHA-256: c0769e97c19991b32f7f9d6d71e630ff3180586345dc603ef19b8b99a17cb6e9
156 Risk Score

Malware Insights

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

The PDF contains a significant number of external links, with one heuristic specifically identifying it as a 'PDF_SEO_LINK_FARM'. The primary malicious URL identified is 'https://trafftec.ru/123?utm_term=nitro+type+hack+2019', which is likely used to redirect users to malicious content. The ML classifier and ClamAV detection strongly indicate malicious intent, classifying it as a phishing trojan.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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 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.
  • 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://trafftec.ru/123?utm_term=nitro+type+hack+2019 PDF link annotation
    • https://site-1244713.mozfiles.com/files/1244713/application_form_template_in_html_free.pdfIn PDF document text
    • https://cdn.sqhk.co/tasokuxu/0geCxgG/fantasy_premier_league_captain_picks_gameweek_15.pdfIn PDF document text
    • https://cdn.sqhk.co/mofijovelu/YgjqYmy/97503374196.pdfIn PDF document text
    • https://site-1175420.mozfiles.com/files/1175420/lulekuvudiweperapogak.pdfIn PDF document text
    • https://site-1193774.mozfiles.com/files/1193774/bihar_masti_in_2019_bhojpuri_dj.pdfIn PDF document text
    • https://site-1203694.mozfiles.com/files/1203694/carunculae_myrtiformes_picture.pdfIn PDF document text
    • https://jajaleregonu.weebly.com/uploads/1/3/4/2/134235513/xogojadux-kejidi-wisal-kupizekof.pdfIn PDF document text
    • https://zezevibowavaki.weebly.com/uploads/1/3/4/8/134854125/wopekepe-subiberebiza-xexakojigexud.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4409811/normal_5ff1d927421a4.pdfIn PDF document text
    • https://nugibunexediga.weebly.com/uploads/1/3/0/7/130740514/ec632b9504.pdfIn PDF document text
    • https://nufewaxitobazat.weebly.com/uploads/1/3/4/7/134748461/fenigopujoli-nusewifarawij.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/wegugus/how_to_facebook_on_iphone_6.pdfIn PDF document text
    • https://s3.amazonaws.com/juliziwojatige/21660598390.pdfIn PDF document text
    • https://s3.amazonaws.com/somisilegex/94459900747.pdfIn PDF document text
    • https://s3.amazonaws.com/novifamigot/65821080867.pdfIn PDF document text
    • https://s3.amazonaws.com/henghuili-files/marguerite_yourcenar_memoirs_of_hadrian.pdfIn PDF document text
    • https://s3.amazonaws.com/zuxadol/b._com_sem_4_books_gujarat_university.pdfIn PDF document text
    • https://s3.amazonaws.com/jinabisura/amilcar_cabral.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00013a82.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13A82 5428 bytes
SHA-256: fb745fd1019117130a8d96236a45e785a1ab27f660bed734759f35b9d6a38337
font_01_sfnt_off00014cfb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x14CFB 2396 bytes
SHA-256: 462f5635b79f604c6d22a6ddc83a2514ef27eccc4eac6906ee322ebcfc1ea616
font_02_sfnt_off00015779.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x15779 12356 bytes
SHA-256: e3c733c910fae73c03e490a156674cfef8e24624c7e1f31615e2a1695a42aac2

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