Malicious PDF — malware analysis report

Static analysis result for SHA-256 a57b98ac25392f3d…

MALICIOUS

PDF

90.5 KB Created: 2021-03-29 17:15:22 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-24
MD5: 79e75bf3fc4317fe9659fe3d53544346 SHA-1: c738aaf433a3641d231d3b88307df249aec19869 SHA-256: a57b98ac25392f3dba4d482fc6b3884245bfdbcf739e3944d3a2ef609c289bf8
96 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

This PDF document was flagged as malicious by ClamAV and an ML classifier. The file embeds external URLs that direct users to attacker-controlled resources. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

Heuristics 4

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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://zajinet.ru/award?keyword=syok+sepsis+adalah+pdf PDF link annotation
    • https://static.s123-cdn-static.com/uploads/4393908/normal_60086bf5a3836.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4499942/normal_60025fe404e67.pdfIn PDF document text
    • https://kejarokelevu.weebly.com/uploads/1/3/5/2/135297316/8085778.pdfIn PDF document text
    • http://bebetadiruj.mywebcommunity.org/tabla_periodica_de_los_elementos_metales_no_metales_y_semimetales.pdfIn PDF document text
    • http://zevewidojodot.mywebcommunity.org/math_puzzle_games_with_answers.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4417306/normal_60081942640d6.pdfIn PDF document text
    • https://cdn.sqhk.co/toromerepowa/8ihjcLN/6423720360.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4380237/normal_60135da65e971.pdfIn PDF document text
    • http://suziterunedoloj.sportsontheweb.net/astrology_manual.pdfIn PDF document text
    • https://lofusomibebez.weebly.com/uploads/1/3/2/7/132740423/8886687.pdfIn PDF document text
    • https://cdn.sqhk.co/vamosopon/gcOJcWz/2_player_games_ps4_split_screen.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4468537/normal_5fe1d143c1e04.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
    • https://s3.amazonaws.com/fizufapu/91112013456.pdfIn PDF document text
    • http://tagijonegularol.myartsonline.com/luvebilapoxosatune.pdfIn PDF document text
    • https://s3.amazonaws.com/dusubonifu/zojonivaxipevasuboluveve.pdfIn PDF document text
    • https://s3.amazonaws.com/tigovatolis/crash_report_online_wa.pdfIn PDF document text
    • http://tiwosutodegadax.onlinewebshop.net/canned_meat_products.pdfIn PDF document text
    • https://s3.amazonaws.com/buganabowumujef/new_bengali_film_2018.pdfIn PDF document text
    • http://pevipitoz.atwebpages.com/bomabofu.pdfIn PDF document text
    • http://nomamazuzut.atwebpages.com/1997_mercruiser_3.0_lx_service_manual.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0001170d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1170D 4904 bytes
SHA-256: 570df879e8f5ed1937cd0c25fad947022cb689043906268d13d9730270d6b488
font_01_sfnt_off000127cb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x127CB 11672 bytes
SHA-256: 5a237e80452016545d96f86ffcc95320c8c7016bd96dbf1ec4edca7ce1215bf9
font_02_sfnt_off00014ea8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x14EA8 4324 bytes
SHA-256: ff5f0ef16caf3e97cd1984b3a03ea88e11eab8cf63d2ee006085a4b9995833f3

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