Malicious PDF — malware analysis report

Static analysis result for SHA-256 34852bd4642087ed…

MALICIOUS

PDF

86.7 KB Created: 2021-04-05 21:44:26 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-23
MD5: 2520f1339f7e7a9c11920e8c2288ac47 SHA-1: e747041a2772824463fc26e50744d2ecf1fd62d6 SHA-256: 34852bd4642087ed95c597630751c440e8bfd31f1d10edd8b38e9b9da75624ee
156 Risk Score

Malware Insights

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

The PDF file contains numerous external links, with a primary focus on 'https://xezojetit.ru/award?keyword=combiner+deux+pdf+en+un', suggesting a phishing or malware distribution attempt. ClamAV detection as 'Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0' and ML classification further support its malicious nature. The document body, though heavily obfuscated, appears to be related to PDF manipulation, aligning with the lure.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9995

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://xezojetit.ru/award?keyword=combiner+deux+pdf+en+un PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4410194/normal_6048638033c8d.pdfIn PDF document text
    • http://sunakijabe.sportsontheweb.net/65016505405.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4416790/normal_5fc7ea11cf6a5.pdfIn PDF document text
    • http://jokidinavefo.22web.org/podarodigawukufu.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4371246/normal_6044ae2d44d0b.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366357/normal_601b6650ce413.pdfIn PDF document text
    • https://pekumovulimezel.weebly.com/uploads/1/3/4/3/134363026/a743a14b36bc7.pdfIn PDF document text
    • https://joginogi.weebly.com/uploads/1/3/1/1/131163620/5309025.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4418365/normal_6066bdc5a10cf.pdfIn PDF document text
    • https://birirewenojitu.weebly.com/uploads/1/3/0/8/130813362/35291feda1.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/tudawufed/50p_coins_worth_money_girl_guides.pdfIn PDF document text
    • https://s3.amazonaws.com/pegebunov/bapulopiperuxuriz.pdfIn PDF document text
    • https://s3.amazonaws.com/jolituzoji/utorrent_mac_ing_metadata.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/2f2a841e-907c-4cd9-9ea0-5d7e8bdc8e65/49140515274.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/f4af9614-986b-4418-9d66-47ec5572ef88/braun_series_7_shaver_7840s_review.pdfIn PDF document text
    • https://s3.amazonaws.com/tevigotu/4091107635.pdfIn PDF document text
    • https://s3.amazonaws.com/vanatul/11806079520.pdfIn PDF document text
    • http://gajutar.onlinewebshop.net/6817311873.pdfIn PDF document text
    • http://suregemebibu.rf.gd/logical_reasoning_questions_and_answers_for_class_5.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/77d53934-3d21-470c-a0f0-f4cf7bc08c35/99037479345.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/4d2fe7be-0ee8-43a1-91ad-7d322704d201/harry_potter_and_the_philosophers_stone_novel_pages.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/fd83593d-41cf-484c-8b1c-e18d2be05643/pugexoxominax.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
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0001002e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1002E 4880 bytes
SHA-256: 54a5ff3aa8ee1356884732b95425baed6b7ab77e5a01ef206d5722983c1edf1a
font_01_sfnt_off000110a6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x110A6 12400 bytes
SHA-256: 4dc42f6a6c109ccae68ef6094e0d0d645082ff286a988400296dba6ac2a57a52
font_02_sfnt_off000137dd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x137DD 16388 bytes
SHA-256: 534e44c921e8acb9c8e993207df297c85ca6c672af4c6174c05b3ca24a170572

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