Malicious PDF — malware analysis report

Static analysis result for SHA-256 e74f3b84a55f127b…

MALICIOUS

PDF

71.4 KB Created: 2021-02-19 02:53:58 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-06-17
MD5: a27fb6052f5795e7efacaf8dae4d0417 SHA-1: b80a50707afe3c2064f45d35405ea1701a1d40b4 SHA-256: e74f3b84a55f127b363ecaa8ad950e943fe2e7aae3363d8e2ca581d57d1b0fe9
156 Risk Score

Malware Insights

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

The PDF contains a large number of external links, many of which are to PDF files, suggesting a link farm or SEO poisoning attempt. The ClamAV detection and ML classifier strongly indicate maliciousness. The embedded URL `https://jacksth.ru/123?utm_term=my+computer+does+not+recognize+my+garmin` appears to be a lure, mimicking a search result to encourage clicks.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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=my+computer+does+not+recognize+my+garmin PDF link annotation
    • https://cdn.sqhk.co/munoforifuso/oDgctjf/jinamusolorubarib.pdfIn PDF document text
    • https://cdn.sqhk.co/tajudozizif/djj68XT/az_900_microsoft_azure_fundamentals_exam_questions.pdfIn PDF document text
    • https://cdn.sqhk.co/wefekoferu/fp9XSgd/how_to_check_my_etisalat_landline_bill.pdfIn PDF document text
    • https://cdn.sqhk.co/zikufivol/oA1jeif/jackbox_party_pack_3_xbox_one_review.pdfIn PDF document text
    • https://cdn.sqhk.co/sunomedude/Ljf3ajh/13184745234.pdfIn PDF document text
    • https://cdn.sqhk.co/naxemikomeb/t2jczGd/8397203716.pdfIn PDF document text
    • https://nufapapezo.weebly.com/uploads/1/3/0/9/130969462/gozutanodajabe_vizusu_nijixim_gusijubipesepiw.pdfIn PDF document text
    • https://cdn.sqhk.co/pesunexaxak/uikibif/zitekalegipaxurejovufiro.pdfIn PDF document text
    • https://cdn.sqhk.co/jukusenefow/ffPiaii/74499351250.pdfIn PDF document text
    • https://cdn.sqhk.co/viwiratoposu/iijSBbi/36027179665.pdfIn PDF document text
    • http://daselefufirapim.iblogger.org/nursing_cover_letter_template_australia.pdfIn PDF document text
    • https://cdn.sqhk.co/lusikagidet/cc1hhT0/41609169911.pdfIn PDF document text
    • https://muvitexovab.weebly.com/uploads/1/3/4/6/134639258/rewukarewobepi.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://buwobazakosujo.rf.gd/11210447706.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_off0000da3d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDA3D 5520 bytes
SHA-256: 1fb96379721ccec434f34d35d1e27e2b05c7d8c4f4c2ee72087312d49e3bf249
font_01_sfnt_off0000ed03.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xED03 10304 bytes
SHA-256: a6a3d16525b17b227a2fbecce4d492c5e8e1881c1c84edb73cf72a9058eb26ac

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