Malicious PDF — malware analysis report

Static analysis result for SHA-256 b59268da96af9677…

MALICIOUS

PDF

97.8 KB Created: 2021-01-26 13:45:44 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-12
MD5: c09196e1493d3d160f610ad18da9572b SHA-1: e6692d4f15227860b720866308e9ed6c96dfd7cd SHA-256: b59268da96af9677a62e7f94bcbb823dd2d472f3e82760a34413748cad8d2c74
156 Risk Score

Malware Insights

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

The PDF file contains a large number of external links, with one heuristic specifically identifying it as a 'PDF_SEO_LINK_FARM'. The primary external URL, 'https://jacksth.ru/123?utm_term=ken+persona+3+va', is likely part of this malicious infrastructure. ClamAV and ML classifiers also flagged this PDF as malicious, indicating a phishing or trojan-like behavior.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9993

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
  • 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://jacksth.ru/123?utm_term=ken+persona+3+va PDF link annotation
    • https://lakojelot.weebly.com/uploads/1/3/1/6/131637836/2585083.pdfIn PDF document text
    • https://valezuxaj.weebly.com/uploads/1/3/4/6/134650604/5488726.pdfIn PDF document text
    • https://cdn.sqhk.co/tivinarafuvu/o8W9gj2/59921728562.pdfIn PDF document text
    • https://cdn.sqhk.co/tinupolureg/kjcZhbD/european_top_scorer_2020_21.pdfIn PDF document text
    • https://jubaxotuxemis.weebly.com/uploads/1/3/5/3/135301284/9669163.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4454809/normal_6008c542ea073.pdfIn PDF document text
    • https://cdn.sqhk.co/jukusenefow/R4ieKig/outbreak_synonym_phrase.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4501659/normal_5fd149791ef91.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4447464/normal_600efa674bf45.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/kakekojezutok/rediriwajixipojemi.pdfIn PDF document text
    • https://s3.amazonaws.com/tawovojo/sound_box_image.pdfIn PDF document text
    • https://s3.amazonaws.com/tudawufed/purple_iptv_apk.pdfIn PDF document text
    • https://s3.amazonaws.com/vitelitubovuluj/crossword_answer_for_british_verb_ending.pdfIn PDF document text
    • https://s3.amazonaws.com/sagotomagin/aqw_chaos_slayer_class_guide.pdfIn PDF document text
    • https://s3.amazonaws.com/gumagabu/sabbatical_leave_approval_letter_template.pdfIn PDF document text
    • https://s3.amazonaws.com/jemazejodep/diablo_3_botting_guide.pdfIn PDF document text
    • https://s3.amazonaws.com/jevopemosod/ridof.pdfIn PDF document text
    • https://s3.amazonaws.com/vexeliku/69704699561.pdfIn PDF document text
    • https://s3.amazonaws.com/nademopor/draconic_evolution_1._12_guide.pdfIn PDF document text
    • https://s3.amazonaws.com/ravuxudibure/luweneziregovexip.pdfIn PDF document text
    • https://s3.amazonaws.com/sorapobuk/podoximodakizopawu.pdfIn PDF document text
    • https://s3.amazonaws.com/jigezilor/tazariwixiruzufe.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000133a2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x133A2 3828 bytes
SHA-256: 3dec48575b7f686abe8a16a8a65ae79420708a5f45cd5d4c735c4a83e13ce919
font_01_sfnt_off00014173.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x14173 4976 bytes
SHA-256: b734670f4e11e59b5c508f8c17e3a5392428e1ed0526677697528d54e0b3987e
font_02_sfnt_off00015276.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x15276 12060 bytes
SHA-256: 4c85a86202614770d47e521736062920889ef280e306c07f892d47b39524c9ff

Open this report in the interactive analyzer, or submit your own file for analysis.