Malicious PDF — malware analysis report

Static analysis result for SHA-256 f969045f1ca51d40…

MALICIOUS

PDF

88.2 KB Created: 2021-03-11 05:39:52 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-21
MD5: b3445661ac8297f44a00317bfee1406e SHA-1: 7fd1ea67f0740f8fd976557fd345604533de6ed1 SHA-256: f969045f1ca51d409b490f74cf25398cdde8805777882cc5c5883d9f61d44098
96 Risk Score

Malware Insights

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

The PDF file contains heuristics indicating an external URI and is flagged by ML classifiers and ClamAV as malicious, specifically as a phishing trojan. The embedded URL, 'https://maypoin.ru/123?utm_term=mandatory+reporting+legislation+act', is likely used to deliver a phishing page or a secondary payload. The document body, though heavily obfuscated, contains text related to 'mandatory reporting legislation act', suggesting a social engineering lure.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 4

  • 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://maypoin.ru/123?utm_term=mandatory+reporting+legislation+act PDF link annotation
    • https://static.s123-cdn-static.com/uploads/4414341/normal_5ff40b38c6036.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4486987/normal_5ff515f7aef01.pdfIn PDF document text
    • http://tujidal.mypressonline.com/antioxidant_activity_of_moringa_oleifera.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4382771/normal_600cf5f86ab16.pdfIn PDF document text
    • http://mitutepoka.medianewsonline.com/18167168515.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4466368/normal_6020445b1d2fc.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4530151/normal_6046330d1b582.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/begijufadi/55966080294.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/b2239d0b-cd10-4a7e-97b6-95d1bac6bde6/77790876604.pdfIn PDF document text
    • http://faxajipemafeb.epizy.com/central_limit_theorem_example.pdfIn PDF document text
    • https://s3.amazonaws.com/takebemanijewok/vba_set_constant_worksheet.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/a7bfff7c-c8c7-42c6-8e16-384494700dc7/indian_vegan_cookbook.pdfIn PDF document text
    • https://s3.amazonaws.com/pasawexawinogad/adding_three_addends_worksheet.pdfIn PDF document text
    • https://s3.amazonaws.com/sesafefanulokam/arcane_duelist_pathfinder_guide.pdfIn PDF document text
    • https://s3.amazonaws.com/fewunadupop/rakusenowukitaropunafixow.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/59303d5f-3b39-4f35-8096-c7a8d5012fb0/34822386658.pdfIn PDF document text
    • http://tonavisuma.onlinewebshop.net/which_brand_of_fridge_freezer_is_the_most_reliable.pdfIn PDF document text
    • http://vobafuge.epizy.com/16194265260.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_off00011c67.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11C67 5348 bytes
SHA-256: aafe61887143a591fe2210c037c4b174ea564dab98eb5c1aad96b994360e1d04
font_01_sfnt_off00012ebc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12EBC 10944 bytes
SHA-256: c2912c14fc608deee44f2c5c01615f4848e8e3debb501299a82d61fa601facee

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