Malicious PDF — malware analysis report

Static analysis result for SHA-256 042386b3c48b6161…

MALICIOUS

PDF

80.5 KB Created: 2021-04-04 05:27:57 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 7761e2f1ef1b6e9308830e9cff749bfc SHA-1: 563c363e27798fc539223921659e06c5c1944341 SHA-256: 042386b3c48b61616aec63e098d827479cfed0cfa36a37f3754376e02b4d7a1c
96 Risk Score

Malware Insights

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

The PDF file was detected as malicious by ML classifiers and ClamAV, indicating a high likelihood of malicious intent. It contains an embedded URI pointing to a suspicious domain, likely intended to redirect the user to a phishing or malware distribution site. The document body, though heavily obfuscated, appears to be a lure related to a book title, suggesting a social engineering tactic.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

Heuristics 4

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://soxebez.ru/strik?utm_term=what+is+the+tattooist+of+auschwitz+about
    • https://cdn.sqhk.co/geroterunetu/aczM2hh/farms_village_happy_township_nj.pdf
    • https://static.s123-cdn-static.com/uploads/4443595/normal_5fdeab479fe6b.pdf
    • https://cdn.sqhk.co/xiroxozalal/jhaqvuw/ppt_circular_diagram_template.pdf
    • https://cdn.sqhk.co/zanuduwedimu/Kgi1Uih/cross_stitch_patterns_free_download_flowers.pdf
    • https://cdn.sqhk.co/vivijuzajus/bgeU9ij/57991389647.pdf
    • https://cdn.sqhk.co/nugizape/DZUiihg/sedumadapewow.pdf
    • https://cdn.sqhk.co/savadapo/n3Wheji/roblox_mining_inc_remastered_script.pdf
    • https://cdn-cms.f-static.net/uploads/4450338/normal_603178cf30229.pdf
    • http://zenarajare.22web.org/fur_elise_music_box_sheet.pdf
    • https://cdn.sqhk.co/sogefuluf/SZhhhjm/38710143680.pdf
    • http://fufejezonodim.mywebcommunity.org/vuxan.pdf
    • https://cdn.sqhk.co/zetuzire/dhOifcP/chess_clash_of_kings_apk.pdf
    • https://cdn.sqhk.co/letarezetap/gchdjaG/lolegafofapolad.pdf
    • https://cdn.sqhk.co/xafogatok/jIvz8ix/zokufowi.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://s3.amazonaws.com/nabifovu/55526774769.pdf
    • https://s3.amazonaws.com/jemisajoda/30631119083.pdf
    • http://zijedan.atwebpages.com/bruchrechnen_einfach_erklrt.pdf
    • http://zevovalik.epizy.com/sizipiriziwumegurede.pdf
    • http://wisalawisavu.epizy.com/mathematical_statistics_download.pdf
    • https://s3.amazonaws.com/mikibetiv/mofamamatir.pdf
    • https://s3.amazonaws.com/zafaronivaj/wonobabuvopazeje.pdf
    • https://s3.amazonaws.com/xamibudasagas/jolly_phonics_set_3_worksheets.pdf
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/
    • http://scripts.sil.org/OFL

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000fb96.bin
c994f70537111aae39947acf5c8a51a0a5b36a094ceb7295c6deb03afb044b84
pdf-font-stream PDF embedded font (sfnt) at offset 0xFB96 5136 bytes
font_01_sfnt_off00010d38.bin
c1ed537b5c64ce3036761c1552b67513932ee38e18bbf4dde8f7531b6e591918
pdf-font-stream PDF embedded font (sfnt) at offset 0x10D38 11936 bytes