Malicious PDF — malware analysis report

Static analysis result for SHA-256 832426d4305b9748…

MALICIOUS

PDF

88.8 KB Created: 2021-06-25 23:26:50 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 018bfaa70be61680eac7c0dc97205bec SHA-1: c638931783046e397c8fa4984a578fb0eba4c52d SHA-256: 832426d4305b9748fb55e45ca393f83663c2672eac8bd24b3b091e317a14b28e
164 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains embedded JavaScript, a common technique for executing malicious code within documents. It also features a link farm pointing to multiple distinct hosts, including compromised WordPress sites, suggesting an attempt to obscure the final destination and evade detection. The ClamAV detection and ML classifier strongly indicate malicious intent, likely for phishing or distributing further malware.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9835

Heuristics 7

  • 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.
  • Embedded JS stream low PDF_JS
    PDF references a /JS stream. Generic JavaScript is common in benign forms; specific dangerous APIs are scored by separate rules.
  • 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 http://www.leads-bd.org/app/webroot/js/ckfinder/userfiles/files/disesifiluvigixopo.pdf
    • http://www.lavalledesign.com/wp-content/plugins/formcraft/file-upload/server/content/files/160963e6501606---zumelavupo.pdf
    • http://ladyvenus.it/userfiles/files/fujarapaduwozuvavovikuza.pdf
    • https://apoc.com.au/wp-content/plugins/super-forms/uploads/php/files/7d04d58eae222e15fa8c20349acdd410/48455445232.pdf
    • http://generaltubi.com/container/ckfiles/files/10321107742.pdf
    • https://brianhigbielaw.com/UserFiles/file/39092240535.pdf
    • https://anukulagrotech.com/ci/userfiles/files/mivelevopabizerunafotij.pdf
    • https://www.prowallpanama.com/wp-content/plugins/super-forms/uploads/php/files/4d457bcedfe78b5b3f4dd9b5ffd9041c/lujetugup.pdf
    • http://brothersaluminium.com.np/wp-content/plugins/formcraft/file-upload/server/content/files/160c27c124fdae---47552888303.pdf
    • http://theopenhouseclub.com/wp-content/plugins/super-forms/uploads/php/files/ae70d281f93ef065fbf4aaf098aad05c/vogebaf.pdf
    • http://valifyrepapillon.com/clients/6/68/68e1c6a84db99a04c21676ff826d6e37/File/11856986701.pdf
    • http://alphabodysupplements.com/newerac2c/userfiles/file/86353365724.pdf
    • http://www.zav-mito.si/wp-content/plugins/formcraft/file-upload/server/content/files/160bf8059e1920---debeg.pdf
    • https://growlocals.com/wp-content/plugins/super-forms/uploads/php/files/9d33aca55993587aa358786f8f792f23/muwujopewunagiv.pdf
    • https://tuabogadoangel.com/wp-content/plugins/super-forms/uploads/php/files/a6835a461aeaa01f3c172fccecb498b0/desepuvasobemifigenafevop.pdf
    • https://connect.allianceflooring.net/wp-content/plugins/super-forms/uploads/php/files/d33b6e9aeeddd6406e5c1c4d77e37f5b/guniguvevunabuzesexuwe.pdf
    • http://www.patricktennis.nl/wp-content/plugins/formcraft/file-upload/server/content/files/1607241b1eba7d---bufanazefufumujime.pdf
    • http://jevades.com/aircraft/fckimages/file/sewabubewupamibula.pdf
    • https://alice-immo.com/userfiles/file/50583469973.pdf
    • https://www.enviedecrire.com/wp-content/plugins/formcraft/file-upload/server/content/files/160805addbd80f---zumuxa.pdf
    • http://www.marcelasemper.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a0211b242c8---zusol.pdf
    • https://tuabogadoangel.com/wp-content/plugins/super-forms/uploads/php/files/79af872f6504c301720a64a76bf93dac/37651213031.pdf
    • https://autosofortkauf.ch/wp-content/plugins/super-forms/uploads/php/files/bkkrj2so3s5u8mosv2nvv25b3j/barixak.pdf
    • https://www.pennlighting.com/wp-content/plugins/super-forms/uploads/php/files/b410ceabfdd0f44a728b37753baa3401/93727109201.pdf
    • http://sshs61.com/clients/6/60/60e739d5a8cf4a6710e4f064fd99417d/File/fibomawegum.pdf
    • http://stepsforstarlight.org/clients/c/c6/c668404594a1c08d975ab50c7bec58f6/File/55713663438.pdf
    • https://aquariumfargo.com/wp-content/plugins/super-forms/uploads/php/files/b0134dd946ab25fb43c92fc1029e4fee/fisoju.pdf
    • https://benchmarktransitions.com/wp-content/plugins/formcraft/file-upload/server/content/files/160abf658d4b76---gipiwusagixipowomosuvugen.pdf
    • https://feedproxy.google.com/~r/Uplcv/~3/BvfzZFkJO3s/uplcv?utm_term=double+pole+switch+installation
    • 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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000f65e.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1		 pdf-font-stream PDF embedded font (sfnt) at offset 0xF65E 16792 bytes
font_01_sfnt_off00010e70.bin
0359f4d6fc2f3146ec3e92cd015d4b95c2b665ec0ca22686c8f4b6c4fb5c98ca		 pdf-font-stream PDF embedded font (sfnt) at offset 0x10E70 17752 bytes
font_02_sfnt_off00013d39.bin
79f1336aab113ce1d0b7439f7d18cd357eb4fec59ec79787ad4b0566360e8cd0		 pdf-font-stream PDF embedded font (sfnt) at offset 0x13D39 10696 bytes

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