Malicious PDF — malware analysis report

Static analysis result for SHA-256 f023f5f17403f166…

MALICIOUS

PDF

72.5 KB Created: 2021-01-27 12:06:14 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-14
MD5: 8e8aed0abdeb31a05881e249d3edf3da SHA-1: f9631db7f12495b32827dcee9b4982a5452638f7 SHA-256: f023f5f17403f1663c89dc16263d4dbfc3321687231b983111e4a253e6b55b38
156 Risk Score

Malware Insights

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

The PDF contains a large number of external links, with one heuristic specifically identifying it as a 'PDF_SEO_LINK_FARM'. The presence of the URL 'https://baarspo.ru/123?utm_term=good+luck+rituals+for+gambling' suggests a potential phishing or malicious redirection attempt. ClamAV detection and ML classification further support its malicious nature, indicating it's likely a phishing or trojanized PDF.

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://baarspo.ru/123?utm_term=good+luck+rituals+for+gambling PDF link annotation
    • http://tomandbxof.site/acceleration_of_gravity_pendulum_formula00s54.pdfIn PDF document text
    • http://everydays.space/digital_marketing_company_new_yorksd52c.pdfIn PDF document text
    • https://saduzuwaz.weebly.com/uploads/1/3/4/5/134599146/9145984.pdfIn PDF document text
    • https://cdn.sqhk.co/betewulo/heRBjeM/40165283605.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4405687/normal_5fd11d01d79ae.pdfIn PDF document text
    • http://prizinsta365.online/batteries_plus_campbell_springfield_mox0dy1.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4445888/normal_5feda2902d06e.pdfIn PDF document text
    • https://xitukamobem.weebly.com/uploads/1/3/4/6/134643312/dabawudalugaju.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4421940/normal_5fe995cb30b33.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4388293/normal_5fde5bead7b49.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/bezegoluzose/circle_of_life_choir_sheet_music.pdfIn PDF document text
    • https://s3.amazonaws.com/xumakomowi/maximum_sheets_of_paper_per_stamp.pdfIn PDF document text
    • https://s3.amazonaws.com/zaxuledo/92078146567.pdfIn PDF document text
    • https://s3.amazonaws.com/laginekux/pottery_barn_baby_boy_crib_sheets.pdfIn PDF document text
    • http://fozosoripivo.epizy.com/network_test_questions_and_answers.pdfIn PDF document text
    • http://bexatati.epizy.com/meme_generator_free_apk_uptodown.pdfIn PDF document text
    • http://selofedibaxonal.epizy.com/android_1mobile_market.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_off0000df1a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDF1A 5576 bytes
SHA-256: 2d922a61460fe027ba952d18292b2a2200bb537e9bca5cab37b8ce16a41d8dd2
font_01_sfnt_off0000f200.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF200 10300 bytes
SHA-256: 132cf32cb86c7eb0054cd077b309184e1c34c1d43542a723d4f94f303abcd6f4

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