Malicious PDF — malware analysis report

Static analysis result for SHA-256 69480d903004380d…

MALICIOUS

PDF

86.8 KB Created: 2021-06-26 22:01:42 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: d0aeb7e365a27d53f9506a42a2b7a044 SHA-1: 1d0a5da5377efe36e48f19ca05c06ca6c9ecb390 SHA-256: 69480d903004380d712c561f8258e2d919b045b5e72f6e0b3d61b739ae9189a8
176 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

The PDF contains numerous links pointing to compromised WordPress installations and disposable domains, indicative of a link farm designed to host malicious content or phishing pages. The ML classifier and ClamAV detection strongly suggest malicious intent, with the primary goal being to lure users to these external sites. The document body is heavily obfuscated and unreadable, providing no direct clues to its purpose beyond the embedded URLs.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9970

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
  • Clickable URI points to raw IP address medium PDF_URI_IP_LITERAL
    PDF contains a clickable HTTP(S) action whose host is a literal IPv4 address. Legitimate documents normally link to named domains; raw-IP destinations are common in disposable phishing and malware-delivery infrastructure.
  • 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 http://www.pianoszimmermann.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/16087c6dc37c48---lesozalunideleg.pdf
    • http://www.megasaludips.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a18d72d4109---58048151099.pdf
    • http://www.orarestauratorisaf.it/wp-content/plugins/formcraft/file-upload/server/content/files/1608e7df23ffd7---jinif.pdf
    • https://thewaves.net/wp-content/plugins/super-forms/uploads/php/files/m567g3r7hp2hua5rnlnobcqgvu/zasivajasopem.pdf
    • https://wills.sg/wp-content/plugins/super-forms/uploads/php/files/614386cc36965a5304fd69f652356442/burigepojigegavujugizofi.pdf
    • http://bagandpack.ru/wp-content/plugins/super-forms/uploads/php/files/6f8054b3cc8ee98932b2b321c1497f5c/47989302723.pdf
    • https://www.goldenplanet.dk/wp-content/plugins/formcraft/file-upload/server/content/files/1609852f982e41---1827385397.pdf
    • https://www.drserapkagan.com/wp-content/plugins/super-forms/uploads/php/files/gaifc3607mf23rhpr8r2srvalc/73754684080.pdf
    • https://dmddsgn.com/wp-content/plugins/super-forms/uploads/php/files/55049725e9633f7f68b87afeb8d604ae/vijisuporizuberugilagu.pdf
    • https://nobleanimalsanctuary.org/wp-content/plugins/super-forms/uploads/php/files/tmp/wewudekosuwu.pdf
    • https://europartner2.pl/uploads/37451708529.pdf
    • http://vudafrique.com/wp-content/plugins/super-forms/uploads/php/files/46a5fdf05cc6a31ad50846e9ae2e4b71/84647039150.pdf
    • http://lirealestatelitigator.com/wp-content/plugins/super-forms/uploads/php/files/78e59ae33243f9b04f2695ae4d7f9af2/rulobasejoxufetogotuwariz.pdf
    • https://canadianrelocation.net/wp-content/plugins/formcraft/file-upload/server/content/files/1607bd8b30798a---jogapibegewibajeguk.pdf
    • http://scissortailfarms.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608b3d52b8170---tirowenexu.pdf
    • https://laneopx.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c46f4899ee9---67009193565.pdf
    • http://www.siscard.com/wp-content/plugins/formcraft/file-upload/server/content/files/16083a6340e5cc---rerez.pdf
    • https://www.intermediastudios.com.mx/wp-content/plugins/super-forms/uploads/php/files/9be697a2adabd53189eba6ffcdb62313/nunesekofidaravaju.pdf
    • http://79.170.40.182/boothtastic.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a95431e70c2---jekugawuzanerokivedupe.pdf
    • http://renovator.cz/files/file/fidebed.pdf
    • https://tripleccompanies.com/wp-content/plugins/super-forms/uploads/php/files/bd9843426779b434eb43fc1740eebe70/baxizijuzisolopef.pdf
    • https://feedproxy.google.com/~r/Uplcv/~3/BvfzZFkJO3s/uplcv?utm_term=beta+thalassemia+and+iron+deficiency
    • 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_off0000efb4.bin
622eb7599c9a3b4751ecb268148ffdd77fca68a58282c0452668eab480d44e90
pdf-font-stream PDF embedded font (sfnt) at offset 0xEFB4 10908 bytes
font_01_sfnt_off000108ca.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0x108CA 16792 bytes
font_02_sfnt_off000120dc.bin
e01463cd24f52723422afb18a0410ef521aa5c9efd91fed3314eb595f448c426
pdf-font-stream PDF embedded font (sfnt) at offset 0x120DC 17204 bytes