Malicious PDF — malware analysis report

Static analysis result for SHA-256 7cfab561edfbd402…

MALICIOUS

PDF

92.8 KB Created: 2020-12-04 14:23:12 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 834417dfb3de420a9fa8f527026e2ef6 SHA-1: 9c4baa3c7cfe42ce98de2cfa2304b01e5edcfc2b SHA-256: 7cfab561edfbd402e1a308caa5178eae79140f7c1e9ed46eac9022a190bf6d6a
154 Risk Score

Malware Insights

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

The PDF contains a critical heuristic firing for a malicious redirector link pointing to 'https://traffmen.ru/aws?utm_term=discrete+wavelet+transform+matlab+code+for+image'. This URL is the primary indicator of malicious intent, likely serving as a lure for phishing or to download further malicious content. The ML classifier also strongly flagged this PDF as malicious.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

Heuristics 4

  • PDF links to known malicious redirector infrastructure critical PDF_MALICIOUS_REDIRECTOR_LINK
    PDF contains a clickable URI to redirector infrastructure used by a known malicious PDF SEO/adware delivery campaign. These documents typically rely on user interaction and redirect chains rather than a PDF parser vulnerability.
  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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://traffmen.ru/aws?utm_term=discrete+wavelet+transform+matlab+code+for+image
    • https://cdn-cms.f-static.net/uploads/4366958/normal_5fbd427a44855.pdf
    • https://cdn-cms.f-static.net/uploads/4374024/normal_5fa7020b21ba8.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://static1.squarespace.com/static/5fc53225b8467722f1efea8f/t/5fca06cd8d0ac92c7be81859/1607075533604/14574598234.pdf
    • https://static1.squarespace.com/static/5fbce344be7cfc36344e8aaf/t/5fbdfca49b1ed03538a0a516/1606286503020/violin_open_strings_sound.pdf
    • https://static1.squarespace.com/static/5fbce344be7cfc36344e8aaf/t/5fbdeedc7acac6192a855f7d/1606282974150/jeremy_lin_akatsuki_shoes.pdf
    • https://static1.squarespace.com/static/5fbce344be7cfc36344e8aaf/t/5fbf5bcecb3e0f577146d424/1606376399411/thou_shalt_not_bear_false_witness_against_thy_neighbour_codycross.pdf
    • https://static1.squarespace.com/static/5fc1497f116eb00e3c4e9468/t/5fc94a44ae6a9904a52c39d5/1607027270619/79371630645.pdf
    • https://s3.amazonaws.com/jofunozuzof/36875361201.pdf
    • https://s3.amazonaws.com/nosepevozux/tabusasetuvuk.pdf
    • https://static1.squarespace.com/static/5fc65077ff13940aa2646620/t/5fc79977788a962b7c344042/1606916471639/91699975749.pdf
    • https://static1.squarespace.com/static/5fc0df209955c744b53b696b/t/5fc3193c3570fb44d169156a/1606621500582/48309884097.pdf
    • https://s3.amazonaws.com/bezegoluzose/70902859771.pdf
    • https://static1.squarespace.com/static/5fc30315bd14ff0dd2aa65c3/t/5fc6e954b2fa4660c8c50c1c/1606871407734/tuning_club_online_mod_apk_money.pdf
    • https://static1.squarespace.com/static/5fbce344be7cfc36344e8aaf/t/5fbf5f57fa04221c7117def1/1606377303937/14897811111.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_off0001067b.bin
5ac157e263d2aba04887f2fa97eaf59a05744d60b3b2e372e59c161c1392f152		 pdf-font-stream PDF embedded font (sfnt) at offset 0x1067B 2952 bytes
font_01_sfnt_off00011106.bin
07dc81266904d62399363956a2516890a89a8e0afb1b1a231d21f72da365315c		 pdf-font-stream PDF embedded font (sfnt) at offset 0x11106 5632 bytes
font_02_sfnt_off00012435.bin
ed9e3886ac212ddb668420e667a115ba623a79d83d13ea8f9b0c1183d3c3e4dc		 pdf-font-stream PDF embedded font (sfnt) at offset 0x12435 12892 bytes
font_03_sfnt_off00014fa8.bin
dc279158ecdd0375b4819925baa6f9a5ec2e7ff2bbde181d1cd53e1c8e6de189		 pdf-font-stream PDF embedded font (sfnt) at offset 0x14FA8 16224 bytes

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