Malicious PDF — malware analysis report

Static analysis result for SHA-256 15ffcd496ee1a8d6…

MALICIOUS

PDF

78.0 KB Created: 2021-02-18 05:11:09 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-15
MD5: a0bc69d239f794336433719fff9e3b69 SHA-1: 2c9637dd320bdc12e6ad38eda846de6730fab592 SHA-256: 15ffcd496ee1a8d692ff6892be03f80ab6508287b4b4fe6701a64531b43eee63
156 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

This PDF file was identified as malicious by multiple heuristics and a machine learning classifier, with ClamAV detecting it as a phishing trojan. The document contains a large number of external links, suggesting a link farm or redirection mechanism. The primary external URI, 'https://baarspo.ru/strik?utm_term=what+causes+water+bumps+on+feet', indicates a likely phishing or scam attempt, aiming to direct users to a malicious site.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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
  • 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/strik?utm_term=what+causes+water+bumps+on+feet PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4420764/normal_5fd22a85208c4.pdfIn PDF document text
    • https://cdn.sqhk.co/giwumazusew/8wogehb/27747771275.pdfIn PDF document text
    • https://cdn.sqhk.co/zetuzire/dhcxjao/lost_temple_endless_run_apk_download.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4375515/normal_5fd18b38f32bb.pdfIn PDF document text
    • https://zukigepuzena.weebly.com/uploads/1/3/4/5/134593101/00d1879c.pdfIn PDF document text
    • https://cdn.sqhk.co/gavezexu/155igS8/77205693175.pdfIn PDF document text
    • https://cdn.sqhk.co/belesobikezi/giwighc/42496581190.pdfIn PDF document text
    • https://cdn.sqhk.co/lojibuwe/Hiamwo4/cute_christmas_backgrounds_for_iphone.pdfIn PDF document text
    • https://cdn.sqhk.co/kojetovukufo/jfg4jhk/hello_kitty_nail_salon.pdfIn PDF document text
    • https://sifejolo.weebly.com/uploads/1/3/1/4/131410009/4ee9aeb1.pdfIn PDF document text
    • https://cdn.sqhk.co/sarafogu/ja2yibp/solar_system_and_star_system_model.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4368494/normal_60115151c4888.pdfIn PDF document text
    • https://rotarivinevi.weebly.com/uploads/1/3/4/5/134599250/woregimibedarowit.pdfIn PDF document text
    • https://cdn.sqhk.co/xoguvamev/ljj9jgU/lie_detector_simulator_apk_download.pdfIn PDF document text
    • https://cdn.sqhk.co/xadowififux/idQfDaJ/ladopugotikokudukasaleba.pdfIn PDF document text
    • https://cdn.sqhk.co/fuwasokeg/75gioib/transformers_earth_wars_combiners_campaign_walkthrough.pdfIn PDF document text
    • https://cdn.sqhk.co/vibebexez/hj5nARA/funny_fat_kid_videos_on_youtube.pdfIn PDF document text
    • https://cdn.sqhk.co/kebisozakola/Hiagyja/gomomawivowefogojivadaxem.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In 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_off0000e62c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE62C 5304 bytes
SHA-256: 26767090543992c0e9f184a6b58ef290562b04c5ca63ec3283fdf2933934e212
font_01_sfnt_off0000f817.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF817 10684 bytes
SHA-256: 9482fc830f61cce5d53872a7e94add835b4048c4ffc942c56688b4f8ef6752be
font_02_sfnt_off00011c96.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11C96 4324 bytes
SHA-256: ce7e2e230a41ba6fc2d7d2240890c8289d67876d84a3d076d67c0b48111c8230

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