Malicious PDF — malware analysis report

Static analysis result for SHA-256 a90cf7106e07e03b…

MALICIOUS

PDF

104.9 KB Created: 2021-06-29 02:51:55 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: dbcdbd79b2b91fbf1be1d335feea0b17 SHA-1: e207d185033b55dc7f57f0d71aa50472d9fb33b2 SHA-256: a90cf7106e07e03b48f46127de3c4b4dfb14d236747466aff0db72f37a39adc8
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

This PDF file was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. The heuristics reveal it functions as a link farm, directing users to multiple compromised or potentially malicious websites hosted on various domains. These links are likely intended to facilitate phishing attacks or distribute further malware payloads.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9888

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • PDF link farm points to compromised-WordPress upload storage medium PDF_COMPROMISED_CMS_UPLOAD_LINK_FARM
    PDF contains multiple clickable links, across many distinct hosts, whose targets are random-slug files parked in the upload directories of vulnerable WordPress form plugins (FormCraft, Super Forms). This is the hallmark of the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains hosted on compromised sites. The PDF itself carries no exploit — the risk is the linked destinations.
  • Small PDF is a non-clustered link farm on disposable hosting medium PDF_SEO_DISPOSABLE_LINK_FARM
    Small PDF contains many clickable external PDF links spread thin across many distinct hosts (no single dominant host), corroborated by a utm_term SEO-redirector link and/or links parked on free/disposable content hosts. This is the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains, rather than a normal document citation pattern. The PDF itself carries no exploit — the risk is the linked destinations.
  • 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://lion-trading.co.uk/wp-content/plugins/super-forms/uploads/php/files/sos58n3qsjatte5lj4tckpm41v/mipuw.pdf
    • https://lcd96.ru/wp-content/plugins/super-forms/uploads/php/files/da11d7632eb0a2d506fe1465ed6291b0/97402303325.pdf
    • http://www.deopendeur.org/imgUser/file/gulidudeziripijiw.pdf
    • https://www.ideaklinikbakirkoy.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a31492b5730---89622069044.pdf
    • http://sunwisechem.com/Uploadfiles/files/99626631430.pdf
    • https://realestateconnect.us/wp-content/plugins/super-forms/uploads/php/files/1gvjapcrhlhqatanhf8nu22jl7/68122186275.pdf
    • http://fitviewer.biz/files/file/65943574709.pdf
    • https://cutletsmeat.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607bcbe83b048---xikibupolasesufewuw.pdf
    • http://www.heksan.com.pl/file/nufodabotivaperuxidazug.pdf
    • https://www.zaantraining.nl/wp-content/plugins/formcraft/file-upload/server/content/files/160ab830687804---69781326197.pdf
    • http://www.rlktechniek.nl/wp-content/plugins/formcraft/file-upload/server/content/files/160d8d3075dab8---68505347699.pdf
    • http://jevades.com/aircraft/fckimages/file/1814857892.pdf
    • http://www.vitrierbxl.be/wp-content/plugins/formcraft/file-upload/server/content/files/160c31bb2c9e24---xasofaxuxidovaberoz.pdf
    • https://luxurytravel-show.com/wp-content/plugins/super-forms/uploads/php/files/1f1a46d9d99164c094d433c08946244d/kexuleba.pdf
    • https://www.reachcast.ca/wp-content/plugins/super-forms/uploads/php/files/5b2d2a4249f0cca7f24c33dd38123b21/47269102762.pdf
    • http://bmhs1963.com/clients/7/72/7286fd37811b7a5dece6e69924e4d5ab/File/sesejemilop.pdf
    • https://dedywiredja.com/wp-content/plugins/formcraft/file-upload/server/content/files/160d75a2ed744e---88613282703.pdf
    • https://www.ikedatosou.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c856f68718f---14413606601.pdf
    • https://tavio.ru/files/file/45180198492.pdf
    • http://dok-vo.ru/userfiles/file/36878850263.pdf
    • http://www.insurancedirectcanada.ca/wp-content/plugins/formcraft/file-upload/server/content/files/1607df1086e176---57959208208.pdf
    • http://andrelandberg.com/userfiles/file/49947609285.pdf
    • https://beautifullifeuk.com/wp-content/plugins/super-forms/uploads/php/files/24a9f4b6b3074fdd7df49630845f2873/30558374600.pdf
    • https://feedproxy.google.com/~r/Uplcv/~3/1KS0DP0cxss/uplcv?utm_term=general+heat+conduction+equation+in+cylindrical+coordinates
    • 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://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_off0001140e.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1		 pdf-font-stream PDF embedded font (sfnt) at offset 0x1140E 16792 bytes
font_01_sfnt_off00012c25.bin
4a24c95189e33df30cc8f9c956354a46232ceaa9680ba6ddf3d2f2e58fd92b87		 pdf-font-stream PDF embedded font (sfnt) at offset 0x12C25 10868 bytes
font_02_sfnt_off00014502.bin
e2928812c8d53d3b1dd0582f6a41a33daa401fe82918195d9066c74550ea1d87		 pdf-font-stream PDF embedded font (sfnt) at offset 0x14502 21980 bytes
font_03_sfnt_off0001801a.bin
505f1f16fb057e2a34e7666bb0a43a50f2e0b7bc0033e59b70183295ac12d2e9		 pdf-font-stream PDF embedded font (sfnt) at offset 0x1801A 16100 bytes

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