Malicious PDF — malware analysis report

Static analysis result for SHA-256 434f70e8a41477e2…

MALICIOUS

PDF

69.0 KB Created: 2020-12-22 04:41:11 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-23
MD5: 6accb5a36048e6f3c2ca4f873f522f64 SHA-1: 7a556d39581ce1e36b88830da026c15ba2844166 SHA-256: 434f70e8a41477e2623df57d0d8f71a993a110f9ce9310515d320dc25f67b32f
214 Risk Score

Malware Insights

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

The PDF contains numerous embedded links, with a critical heuristic identifying it as a redirector to malicious infrastructure. The document body, though heavily obfuscated, suggests a lure related to 'Draftmaster pro apk'. The presence of multiple external PDF links, including one pointing to a known malicious redirector, indicates an attempt to lead the user to malicious content or downloads.

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
  • PDF links to known malicious redirector infrastructure critical PDF_MALICIOUS_REDIRECTOR_LINK
    PDF contains a clickable URI to redirector infrastructure used by a known malicious PDF SEO/adware delivery campaign. These documents typically rely on user interaction and redirect chains rather than a PDF parser vulnerability.
  • 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.
  • 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://traffine.ru/strik?utm_term=draftmaster+pro+apk In PDF document text
    • https://jakedekokobara.weebly.com/uploads/1/3/1/3/131381480/likanutavorolebonat.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4365580/normal_5f88046ddf8a4.pdfIn PDF document text
    • https://vaxidavuk.weebly.com/uploads/1/3/4/3/134371973/zesun-sirux.pdfIn PDF document text
    • https://kufudazasa.weebly.com/uploads/1/3/4/6/134626120/defubomup.pdfIn PDF document text
    • https://futokodoneru.weebly.com/uploads/1/3/0/8/130814407/zamejunisufotajo.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/gajakelegeza/ny_lottery_ticket_barcode_scanner_app_android.pdfIn PDF document text
    • https://s3.amazonaws.com/zagubip/layers_of_atmosphere.pdfIn PDF document text
    • https://s3.amazonaws.com/muvazi/talking_tom_2_apk.pdfIn PDF document text
    • https://s3.amazonaws.com/fojaxexino/crepe_paper_rose_bud_template.pdfIn PDF document text
    • https://s3.amazonaws.com/gozilum/godamorofavesup.pdfIn PDF document text
    • https://s3.amazonaws.com/levovod/free_online_report_card_generator.pdfIn PDF document text
    • https://s3.amazonaws.com/juvetaso/sijekamixefab.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_off0000c8c5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC8C5 5076 bytes
SHA-256: f294abf8aee377f972fdb835c65d75629684cc193224af36b316a3a7111d8c29
font_01_sfnt_off0000da03.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDA03 14508 bytes
SHA-256: e47f64b9fb33390bfc183ea32fcb7013600c6322b2954d10bb552db145bc6010

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