Malicious PDF — malware analysis report

Static analysis result for SHA-256 2bf642fba3b9a703…

MALICIOUS

PDF

75.5 KB Created: 2020-12-24 07:28:01 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-12
MD5: 4d32bc32ba551ee536588cbfc836d93b SHA-1: 674f62873a44353170ccf88d98052770e996bdde SHA-256: 2bf642fba3b9a70357cc142caf0950fff9dd72abae655f52f2e96c9bfabb6b73
214 Risk Score

Malware Insights

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

This PDF file was detected as malicious by ClamAV and an ML classifier, indicating phishing and malicious redirector links. The document contains a large number of embedded URLs, many of which point to PDF files hosted on link farms, suggesting an attempt to manipulate search engine results or distribute further malicious content. The presence of a malicious redirector link further supports the phishing and malware distribution intent.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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
  • 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://gettraff.ru/strik?utm_term=prince+running+game+download In PDF document text
    • https://cdn.sqhk.co/rubekafux/hiehagi/rare_beauty_foundation_swatches_230n.pdfIn PDF document text
    • https://cdn.sqhk.co/faxidopudome/ihhjich/fejaxegiwikonepedesabuxeg.pdfIn PDF document text
    • https://cdn.sqhk.co/wuwovodegi/hYgie3T/sat_practice_test_4_answers_college_board.pdfIn PDF document text
    • https://cdn.sqhk.co/bawivurolut/HgeQhjc/classic_phoenix_arcade_game.pdfIn PDF document text
    • https://cdn.sqhk.co/wopidaxiwuk/0dcjiAc/the_world_of_magic_guide.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4412591/normal_5fa58a444bd6d.pdfIn PDF document text
    • https://xezinaruwi.weebly.com/uploads/1/3/4/4/134479948/937025.pdfIn PDF document text
    • https://cdn.sqhk.co/dekaroku/cibAiiX/scary_teacher_3d_chapter_2_download.pdfIn PDF document text
    • https://cdn.sqhk.co/fakupavod/RDyuHUs/kixafizimadiwutukefi.pdfIn PDF document text
    • https://xuxefakeni.weebly.com/uploads/1/3/4/2/134234722/1d7e85.pdfIn PDF document text
    • https://cdn.sqhk.co/zivugeri/hdPpjbk/snowball_fight_winter_snow_battle_action_games.pdfIn PDF document text
    • https://negapisege.weebly.com/uploads/1/3/4/6/134635707/268503.pdfIn PDF document text
    • https://cdn.sqhk.co/lasotepana/RC1tsLw/razijewu.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In 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_off0000df06.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDF06 4976 bytes
SHA-256: 97f63cf818a7da17b84492c2b3d83b75e3975bfb077258ac64fc1cdbc26040a1
font_01_sfnt_off0000efcc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEFCC 10168 bytes
SHA-256: 8cd715882864eb8a95f0c148959923302a681de7dce4b2a24b24cab30e9e7775
font_02_sfnt_off000112a4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x112A4 4324 bytes
SHA-256: cd94ef65598b1866d0653cdd88243d989fd81359c0e770c2d3a4858f1c2f6d34

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