Malicious PDF — malware analysis report

Static analysis result for SHA-256 f9a7c56014c694e8…

MALICIOUS

PDF

82.4 KB Created: 2021-03-28 09:12:01 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 559d4e731aa1b0107821b8be1dbaf346 SHA-1: d7d35760562054efc1a53bbc79fa6acf1abf3c1f SHA-256: f9a7c56014c694e8a222da6f25c78def8dfe41e3af477bf186eb38840992386f
96 Risk Score

Malware Insights

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

The PDF file was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. It contains an embedded URI pointing to a suspicious domain, likely intended to host a malicious payload or redirect the user to a phishing site. The document body, though heavily obfuscated, suggests a lure related to a 'pedigree worksheet biology 1 answer key', aiming to trick users into clicking the malicious link.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9990

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://mezovuduw.ru/wix?keyword=pedigree+worksheet+biology+1+answer+key
    • https://cdn.sqhk.co/batumozi/AghVfhg/jowawudi.pdf
    • http://tapozifokun.mywebcommunity.org/takukotowatusurosukep.pdf
    • https://cdn.sqhk.co/bipujawojeli/oihZmhh/guess_the_song_by_lyrics_metal.pdf
    • https://cdn.sqhk.co/kidatufo/JiebVhj/tetenosafivozasikarovugi.pdf
    • http://zegobudipaju.mywebcommunity.org/61060684006.pdf
    • https://cdn.sqhk.co/linidivez/khf43hi/monster_rancher_2_psx_cd_list.pdf
    • https://cdn.sqhk.co/woxemevimox/XZb5ujj/strike_fortress_box_game_download.pdf
    • https://cdn.sqhk.co/dojaxeje/jfvHHij/wordpress_plugins_for_blog_layout.pdf
    • https://cdn.sqhk.co/bepoweruga/jhicPgh/90357018806.pdf
    • https://cdn.sqhk.co/xoresarib/tchhdji/lobogam.pdf
    • https://cdn.sqhk.co/wusoxopejezo/d5jhYon/naga_ocean_king_ios.pdf
    • https://cdn.sqhk.co/jejekije/jeHdjdm/2019.pdf
    • https://cdn.sqhk.co/naziwixolagu/cS1rRje/skate_lines_2_ios_download.pdf
    • https://cdn.sqhk.co/riragimi/hege6Xp/red_ball_5_jump_ball_adventure.pdf
    • http://xasedogamif.mypressonline.com/apc_back-ups_cs_500__replace_battery.pdf
    • https://cdn.sqhk.co/virurewev/eoB958o/60544556863.pdf
    • https://cdn.sqhk.co/vevigagexoxa/id2jgn8/mofadajonugofewuse.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://www.daltonmaag.com/
    • https://s3.amazonaws.com/jefobexapulow/befafowijewozaxusixiwira.pdf
    • https://s3.amazonaws.com/kavugusepe/tubumotejitizigujopopukud.pdf
    • https://s3.amazonaws.com/genedesowul/oise_certificate_of_teaching_experience_form.pdf
    • http://pikaderobiw.atwebpages.com/how_to_make_book_in_illustrator.pdf
    • https://s3.amazonaws.com/wizitifowubux/41373660340.pdf
    • https://s3.amazonaws.com/babetafaperaxov/40046408848.pdf
    • https://s3.amazonaws.com/zabevog/panasonic_6.0_plus_user_guide.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_off0000f739.bin
98e581279abdb320294a993449b1cd174992a8916da7bcba8d20fd3adba5bb86		 pdf-font-stream PDF embedded font (sfnt) at offset 0xF739 5328 bytes
font_01_sfnt_off00010962.bin
43b0fbb85c222f8b3502e1cdc5ed7ee4e50530b895befb255a1fd41eaa3f57da		 pdf-font-stream PDF embedded font (sfnt) at offset 0x10962 10628 bytes
font_02_sfnt_off00012dbf.bin
ff5f0ef16caf3e97cd1984b3a03ea88e11eab8cf63d2ee006085a4b9995833f3		 pdf-font-stream PDF embedded font (sfnt) at offset 0x12DBF 4324 bytes

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