Malicious PDF — malware analysis report

Static analysis result for SHA-256 745c6943bbe51883…

MALICIOUS

PDF

59.9 KB Created: 2021-02-28 01:01:49 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-15
MD5: de84b6c34827b59cd47381c033917fd8 SHA-1: bca1587d3d3c61e77c240dc855cc9efd12721b83 SHA-256: 745c6943bbe5188383dc9f4e8bd74cf6fed80cd4d832b8c56636c45ce3f9faa1
64 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

The PDF document contains embedded URLs and is flagged by a machine learning classifier as malicious. The document body, though heavily obfuscated, contains text related to unlocking a safe, which serves as a lure to encourage users to click the external link. The presence of multiple disposable domains and link farm characteristics further indicate malicious intent.

Machine Learning

  • Nyx PDF Classifier malicious score 0.7953

Heuristics 3

  • 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
  • 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://pelibifir.ru/award?keyword=how+to+unlock+a+sentry+safe+with+dead+battery PDF link annotation
    • http://rabisoluvilava.iblogger.org/90698112184.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4367921/normal_6004f26a2bda8.pdfIn PDF document text
    • https://cdn.sqhk.co/kovixileta/gPjaih4/business_relationship_manager_job_description.pdfIn PDF document text
    • https://cdn.sqhk.co/mepowokugo/dhjjZhh/free_dating_apps.pdfIn PDF document text
    • https://pizazolumugi.weebly.com/uploads/1/3/4/0/134016987/gobadujazazitu.pdfIn PDF document text
    • https://cdn.sqhk.co/seponidozit/jbqeq9A/brightocular_eye_color_change_surgery_cost.pdfIn PDF document text
    • https://boxatikavizag.weebly.com/uploads/1/3/4/6/134680825/4453681.pdfIn PDF document text
    • https://cdn.sqhk.co/rabataxuvax/j7jhfjh/marble_machine_x_poster.pdfIn PDF document text
    • https://jefanumu.weebly.com/uploads/1/3/4/8/134889008/991498.pdfIn PDF document text
    • https://gebonevoduxap.weebly.com/uploads/1/3/1/6/131606392/9734590.pdfIn PDF document text
    • https://cdn.sqhk.co/pinofizulag/zThbjaC/fish_eat_fish_3_players_game_hacked.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4489846/normal_5fe222183310d.pdfIn PDF document text
    • https://cdn.sqhk.co/rizijuwet/jjKgdhf/85570591187.pdfIn PDF document text
    • https://suxapenogabako.weebly.com/uploads/1/3/4/6/134602080/joberigiwudujogajem.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://pivipige.epizy.com/grade_5_math_measurement_worksheets_canada.pdfIn PDF document text
    • https://s3.amazonaws.com/pokixovuxik/37559472626.pdfIn PDF document text
    • http://scripts.sil.org/OFLIn PDF document text

Extracted artifacts 1

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e243.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE243 5468 bytes
SHA-256: c59793ddb2057ba6b55eff445a684cb5a00b9b6747f64a942a61d0c537873341

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