Malicious PDF — malware analysis report

Static analysis result for SHA-256 3bb44a0aee80e8d6…

MALICIOUS

PDF

78.9 KB Created: 2020-12-18 12:07:47 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-11
MD5: 444dde43ddb811e3ec4c00e370a575a3 SHA-1: b20d247f0a51cf5c2344670e9a6f936c9a534fe0 SHA-256: 3bb44a0aee80e8d60e561d00d79cf84de76d3e9fef9615322c1f1f7963119522
214 Risk Score

Malware Insights

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

The PDF contains a large number of embedded links, with several pointing to known malicious redirectors and link farms. The ML classifier and ClamAV detection strongly indicate malicious intent. The document body, though heavily obfuscated, appears to be a lure related to 'Hugh Jackman world tour songs', likely to entice clicks on the malicious links.

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://cctraff.ru/strik?utm_term=hugh+jackman+world+tour+songs In PDF document text
    • https://gojenegitoz.weebly.com/uploads/1/3/4/3/134387591/gigodeguromojuva.pdfIn PDF document text
    • https://fagozeku.weebly.com/uploads/1/3/4/5/134506452/telokekelej_surerejipusako.pdfIn PDF document text
    • https://subijiderekura.weebly.com/uploads/1/3/4/6/134616270/nosusitewodikus-nosuwomobebuk.pdfIn PDF document text
    • https://savumolakom.weebly.com/uploads/1/3/4/6/134617738/kusulixugoxi.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4375517/normal_5f8f8364a3358.pdfIn PDF document text
    • https://pitamiled.weebly.com/uploads/1/3/4/0/134098016/sesixix_jobakawir_pofopad_nifelamiwunumab.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/bepukuba/latest_google_play_games_app_apk.pdfIn PDF document text
    • https://s3.amazonaws.com/ravuxudibure/92990933205.pdfIn PDF document text
    • https://s3.amazonaws.com/regegozumekoza/72715657523.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc0ed1560f2895dc1e7fe11/t/5fc23fb63f75b166431e4073/1606565814608/biology_laboratory_manual_a_laboratory_skills_49_answer_key.pdfIn PDF document text
    • https://s3.amazonaws.com/tarajix/debt_snowball_spreadsheet_google_sheets.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/9ffda8e9-82c4-497c-8265-1266862c28d5/paranormal_activity_marked_ones_streaming.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/d5684e43-4372-4a0c-9ff3-ab37676ab721/65835135535.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc6cf4a579eee3ae0699cf0/t/5fd708f196ed101a3e57abdc/1607928050122/47884541722.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_off0000f4d7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF4D7 5548 bytes
SHA-256: 74c3b03dbc2a8c567e3ce17a318ffeae4f701afa237331967d0caa2a6bd5453c
font_01_sfnt_off0001079c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1079C 11780 bytes
SHA-256: 93ce21a333145d78b9d0ae99913381e29a6e70b00134c831777b1679fe52eeac

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