Malicious PDF — malware analysis report

Static analysis result for SHA-256 6202685b5739f8f1…

MALICIOUS

PDF

76.5 KB Created: 2021-01-31 06:52:28 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-11
MD5: ff5ed79e914e3ef2de10cd3031edd1fa SHA-1: ba179d8e6adaa509c6e04eade2dfed6b6d84fe8d SHA-256: 6202685b5739f8f185cde3106326deb4c91580bba5f3dbcfe830fce76d277c78
126 Risk Score

Malware Insights

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

This PDF was flagged by multiple heuristics, including a critical ClamAV detection and an ML classifier, indicating malicious intent. It contains numerous external URIs, with one specifically identified as a link farm on disposable hosting, suggesting a phishing or malware distribution lure. The presence of embedded URLs and the overall structure point towards a spearphishing attachment attack vector.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9992

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 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
  • 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://maypoin.ru/123?utm_term=g+shock+riseman+manual PDF link annotation
    • http://rollernefritmassage.xyz/amazon_prime_my_music_library1m3p7.pdfIn PDF document text
    • https://zozolunefa.weebly.com/uploads/1/3/5/3/135325744/d6d723d0.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4366344/normal_5fd03f37b07e5.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4500440/normal_5fdbf5592a208.pdfIn PDF document text
    • https://jovinafunen.weebly.com/uploads/1/3/2/6/132695325/4266231.pdfIn PDF document text
    • http://ludokebisiw.iblogger.org/ap_bio_cladogram_lab_answers.pdfIn PDF document text
    • http://alexandreablog.com/atlas_world_map_booke7e4y.pdfIn PDF document text
    • http://promooffer.site/ielts_5_practice_tests_academic_set_2_answers2qtay.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4460677/normal_5ff9503810b69.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4413236/normal_5ff613ca6b2c5.pdfIn PDF document text
    • http://creampiepow.club/the_conquest_colonization_apk_downloadyda9o.pdfIn PDF document text
    • https://vozokeku.weebly.com/uploads/1/3/1/8/131857213/kasako.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://mapixuxiloko.epizy.com/33473608260.pdfIn PDF document text
    • https://s3.amazonaws.com/bomifabipi/spiderman_theme_song_piano_sheet_music_free.pdfIn PDF document text
    • http://vatugiw.epizy.com/10th_mark_sheet_2019_cbse.pdfIn PDF document text
    • http://ravigokabuf.rf.gd/10658963106.pdfIn PDF document text
    • http://xugonowelimije.epizy.com/50500360334.pdfIn PDF document text
    • https://s3.amazonaws.com/zabejuvijolu/zetiwudaparuzizuso.pdfIn PDF document text
    • https://s3.amazonaws.com/regufojalojaza/fannie_mae_guideline_on_large_deposits.pdfIn PDF document text
    • http://bapomel.epizy.com/sembaruthi_serial_songs_in_tamil_isaimini.pdfIn PDF document text
    • http://luzigipo.epizy.com/adobe_cs_suite.pdfIn PDF document text
    • https://s3.amazonaws.com/mejigavukolu/wuvolowifevopoputakesitiz.pdfIn PDF document text
    • https://s3.amazonaws.com/xabalaru/windows_10_version_1903_update_free.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_off0000ee72.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEE72 5136 bytes
SHA-256: 854668596850977afdece526ba7adcf146cf42aa271e6977b79d3d9f0e165346
font_01_sfnt_off0000ffc0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFFC0 10204 bytes
SHA-256: 39409b7be693c0f44712a44da74a4adb46da4cb914f1f92b29acd6158d902f52

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