Malicious PDF — malware analysis report

Static analysis result for SHA-256 12e0e6a4edc90db3…

MALICIOUS

PDF

97.6 KB Created: 2021-02-14 13:00:08 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-12
MD5: da7b3ff77087c831666f619d67a998cc SHA-1: 27b22611c4e15e6a718f08226110c4e57347aab9 SHA-256: 12e0e6a4edc90db351e717523543894a40df038a2a2320b859eb6034a246220e
126 Risk Score

Malware Insights

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

The PDF contains a high number of embedded URLs, many pointing to disposable domains and potentially malicious hosting, as indicated by the 'PDF_SEO_DISPOSABLE_LINK_FARM' heuristic. The ML classifier and ClamAV detection strongly suggest malicious intent, likely for phishing or distributing further malware. Although no scripts were explicitly extracted, the nature of the embedded links suggests an attempt to redirect users to malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

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 is a non-clustered link farm on disposable hosting medium PDF_SEO_DISPOSABLE_LINK_FARM
    Small PDF contains many clickable external PDF links spread thin across many distinct hosts (no single dominant host), corroborated by a utm_term SEO-redirector link and/or links parked on free/disposable content hosts. This is the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains, rather than a normal document citation pattern. The PDF itself carries no exploit — the risk is the linked destinations.
  • 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://leonvi.ru/123?utm_term=bronx+collegiate+academy PDF link annotation
    • http://bimiwefumukiv.22web.org/49449590677.pdfIn PDF document text
    • https://cdn.sqhk.co/xedaberetaj/Diehcgj/33776369843.pdfIn PDF document text
    • https://kosodakugup.weebly.com/uploads/1/3/4/6/134655388/fc5fcd.pdfIn PDF document text
    • https://xitapazutirubej.weebly.com/uploads/1/3/4/8/134882608/9467056.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4449392/normal_60099cae6f21c.pdfIn PDF document text
    • https://kaperimivegorew.weebly.com/uploads/1/3/4/3/134371305/5a0af625.pdfIn PDF document text
    • https://migapivali.weebly.com/uploads/1/3/1/3/131381101/8407644.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4501794/normal_6023d1951060b.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4409123/normal_602444d92690f.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4379034/normal_5ff9e1be9198e.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://napilidowolaro.rf.gd/vegonibejisase.pdfIn PDF document text
    • http://vutevesofu.rf.gd/grading_sheet_with_auto_ranking.pdfIn PDF document text
    • http://dinimonubikajo.rf.gd/sda_hymnal_with_chords_pro_apk.pdfIn PDF document text
    • http://buvumitibeve.rf.gd/xitojeboxu.pdfIn PDF document text
    • http://zumewozuzetarun.epizy.com/annual_report_2019_qantas.pdfIn PDF document text
    • http://zobawukesilebaf.epizy.com/kuwegalajosipazo.pdfIn PDF document text
    • http://femasusatatovet.epizy.com/dovetail_saw_guide.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 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00011c59.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11C59 5088 bytes
SHA-256: 335cd9baa0e95b7918fbf136cc880b6bfe5b02b03602f7b3abd0cd0a5576bbbe
font_01_sfnt_off00012d8e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12D8E 11524 bytes
SHA-256: 50acb44a5e81931eef9442833172024ddb3919e142e269225f82b2dead20e537
font_02_sfnt_off00015530.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x15530 16312 bytes
SHA-256: b2563e85233037e3c2780690ed1455257f868516b5a962e54e6ffe29314c9cb1
font_03_sfnt_off00016abb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x16ABB 4324 bytes
SHA-256: b50a2106bf82917db0cd3cf88f63c5e8cc3298b343ace5cffc591b35df33d24c

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