Malicious PDF — malware analysis report

Static analysis result for SHA-256 d1adcc21624b788a…

MALICIOUS

PDF

71.5 KB Created: 2021-03-19 20:29:11 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 0ddbe6f914d0732225ee0cbb37fbdbfc SHA-1: 9d5ed9e06bedf69d1c3068d2a0776bc38e3134fb SHA-256: d1adcc21624b788a8456d3d1fa3af15a52c61c69b6642b95d2227144f259a668
136 Risk Score

Malware Insights

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

This PDF file was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. The presence of an invisible link pointing to a suspicious domain suggests a phishing or malware distribution attempt. The document body, though heavily obfuscated, contains metadata that aligns with PDF generation tools, but no direct scripting was found.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9990

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
  • Image-heavy PDF with invisible link to suspicious domain high PDF_SUSPICIOUS_LINK_LURE
    PDF is a small image-heavy lure with invisible link annotations that send the user to a suspicious high-risk-domain URI. This matches credential-phishing carriers where the visible document is only a prompt and the real collection flow happens on the linked website.
  • 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://resalured.ru/wix?keyword=aunque+no+te+pueda+ver+estas+obrando
    • http://stankovit.ru/dutch_sheets_intercessory_prayerjiv6z.pdf
    • http://uspehdnyaaxyz.xyz/sefajimopumigufuvidudodowjlzz3.pdf
    • https://cdn.sqhk.co/goronikel/eJ3KhhF/the_fatal_raid_2019_netnaija._com.pdf
    • https://cdn.sqhk.co/tororukiwuri/fdQia9I/knife_king_flappy_knife_hit_game.pdf
    • https://cdn.sqhk.co/narulaloro/ibBijhh/97780842434.pdf
    • http://covid-19online.site/7671535977ml9u4.pdf
    • https://cdn.sqhk.co/vinasujitupe/ithdYid/wesavedebinefiduwuzojon.pdf
    • https://cdn.sqhk.co/sozaxejiv/WgejeZC/43004298378.pdf
    • http://pumba.fun/how_to_prepare_for_an_hr_manager_position_interviewjliqf.pdf
    • https://cdn.sqhk.co/ligumorik/giahbtK/8694406134.pdf
    • https://cdn.sqhk.co/sizozizaj/hgJhghg/minerva_mcgonagall_tabby_cat.pdf
    • http://ch-redirect.icu/rovajipuasdii.pdf
    • http://kernig.online/how_much_do_operations_specialists_maked9zcy.pdf
    • https://cdn.sqhk.co/tidilotofuka/4hcC0qB/82903355832.pdf
    • http://securitycheckingbrowservkcom.xyz/85647316052nkazn.pdf
    • https://cdn.sqhk.co/nogorodizet/gjCgcjg/chikki_words_in_english.pdf
    • https://cdn.sqhk.co/datolabevev/fd3jfgz/pictures_of_charli_d_amelio_drinking_dunkin.pdf
    • https://cdn.sqhk.co/teketerep/fj2i2hb/kelivuxebevusutikepidug.pdf
    • https://cdn.sqhk.co/kezomerameki/j5gjVLd/xawuligonatavomoritupov.pdf
    • https://cdn.sqhk.co/varomapit/bDigibW/17522815780.pdf
    • https://cdn.sqhk.co/bezakebijuk/ggiicje/gurikexegumuledezibo.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://www.daltonmaag.com/
    • https://uploads.strikinglycdn.com/files/aecec00d-0d6e-4df2-aae7-1e46e5bf3e0e/moon_river_andy_williams_lyrics_meaning.pdf
    • https://uploads.strikinglycdn.com/files/c67fb902-d4b7-47d5-a617-e4cd016f4fc3/where_is_the_remote_sensor_on_my_samsung_smart_tv.pdf
    • https://uploads.strikinglycdn.com/files/58df281b-4533-4b22-b697-ddeffad100ce/does_netflix_have_the_movie_the_shack.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000ccbf.bin
492c1c6515e9c3f47bc1d6ca445d693907e123884b05baddb735632b8fcd47e8		 pdf-font-stream PDF embedded font (sfnt) at offset 0xCCBF 5072 bytes
font_01_sfnt_off0000ddf5.bin
e13644a1f8f1e6a26e786c1744016134baf92d57473b6e7caaed69d431ecd64b		 pdf-font-stream PDF embedded font (sfnt) at offset 0xDDF5 10564 bytes
font_02_sfnt_off0001008d.bin
0d0f64e27578eb124b8bc81c7eceacdd166e22eddd95c81328e9fbd7de2a6333		 pdf-font-stream PDF embedded font (sfnt) at offset 0x1008D 4324 bytes

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