Malicious PDF — malware analysis report

Static analysis result for SHA-256 7fd2232a7e433d7f…

MALICIOUS

PDF

114.9 KB Created: 2021-03-29 12:27:26 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 38c1cb5e85be74e3c6ea9250690430ae SHA-1: 519d796293209c7f8485bcea7c771442b854cf4c SHA-256: 7fd2232a7e433d7fcb59187202d48b8afb2d7b6c95c76d88afb5998d6a3f17ab
96 Risk Score

Malware Insights

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

The PDF file was flagged by ML classifiers and ClamAV as malicious, specifically as a phishing trojan. It contains an embedded URI pointing to a suspicious domain, likely intended to redirect the user to a malicious site. The document body is heavily obfuscated, suggesting an attempt to hide its true purpose, but the presence of the external URI is a strong indicator of a phishing or credential harvesting attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9995

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://dafemum.ru/wix?keyword=mrs+evans+website+thunderridge
    • http://uaregroup.com/bovidepugutscdn3.pdf
    • http://dekiweragaf.mywebcommunity.org/59816011759.pdf
    • http://com-signto5.xyz/birefopugawosurozikivkf277.pdf
    • http://xepomujix.22web.org/ronizeretawu.pdf
    • http://arbitestpark.xyz/30772261403eag8s.pdf
    • http://wotaxatumumodok.sportsontheweb.net/what_happens_in_the_last_book_allegiant.pdf
    • http://1fps.ru/fresh_ham_cooking_time_convection_ovenjh0l6.pdf
    • http://zabemaladameg.medianewsonline.com/lamexazezozeb.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://www.daltonmaag.com/
    • https://s3.amazonaws.com/paxunu/tv_guide_bbc.pdf
    • https://d2ffd92d-ad89-4e9b-8359-126286817a3c.filesusr.com/ugd/dd9784_e4eff8b1aa66439fb67581c79d8c0441.pdf?index=true
    • http://tukuponuvul.epizy.com/brayton_cycle_with_regeneration_pv_diagram.pdf
    • https://s3.amazonaws.com/waxapoz/44691406409.pdf
    • https://36071b1a-d853-4ad1-bccf-0ed894d94038.filesusr.com/ugd/906e9f_0eb28201b8874bb8b0c702d847062682.pdf?index=true
    • https://5cd500b4-e4f3-461b-9830-2c08da4ac6df.filesusr.com/ugd/2d797c_9624de5f5cab4cc6ace14ff69e536caa.pdf?index=true
    • http://ziboporo.epizy.com/commonly_confused_words_list.pdf
    • https://s3.amazonaws.com/kovezux/56269514567.pdf
    • http://nebojemesiwi.atwebpages.com/wolff_s_anatomy_of_the_eye_and_orbit_download.pdf
    • http://tofilijewok.atwebpages.com/19367577285.pdf
    • https://s3.amazonaws.com/woxewiwupir/3610275848.pdf
    • https://s3.amazonaws.com/zarevizebi/scratch_2_for_linux.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
    • http://dejavu.sourceforge.net
    • http://dejavu.sourceforge.net/wiki/index.php/License

Extracted artifacts 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000161ee.bin
3e33221ceb4b45c3c448c73bf9ec38cca44bbbaa5380afac6e8028e4356598da		 pdf-font-stream PDF embedded font (sfnt) at offset 0x161EE 5124 bytes
font_01_sfnt_off00017363.bin
d6de934816205b9b847177d3799a0ed661906b70f8810631d70c8308a5e45c10		 pdf-font-stream PDF embedded font (sfnt) at offset 0x17363 11520 bytes
font_02_sfnt_off00019ab8.bin
c988415812f594187b0a0ed75dc52802e798e1695b49bd300f8412a65040a449		 pdf-font-stream PDF embedded font (sfnt) at offset 0x19AB8 16204 bytes
font_03_sfnt_off0001afe7.bin
4fcfa7c68d76e23b667942a3ac892d2d5d88346478daafc61479ad4df4af3dd3		 pdf-font-stream PDF embedded font (sfnt) at offset 0x1AFE7 4324 bytes

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