Malicious PDF — malware analysis report

Static analysis result for SHA-256 c07d0f321169e733…

MALICIOUS

PDF

73.2 KB Created: 2021-07-05 11:06:04 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: afde673bb26873125ea3875eceaffee8 SHA-1: b2e4250b91bd5035fed904ad080d63c8be9b9ab7 SHA-256: c07d0f321169e73347d6d7c7c58b9928a72eda3720750549e563507959db7b70
176 Risk Score

Malware Insights

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

This PDF file was flagged by multiple heuristics as malicious, including a high ML score and ClamAV detection. It contains numerous links to external websites, many of which appear to be compromised WordPress installations or disposable hosting. The primary purpose seems to be directing users to these sites, which likely host further malicious content or phishing pages. The presence of raw IP addresses in URIs and link farms suggests an attempt to obscure the final destination and evade basic detection.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9994

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 https://www.carlosfunes.es/wp-content/plugins/formcraft/file-upload/server/content/files/160bc71022c39d---dovak.pdf
    • http://hellnocancershow.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608399ab488eb---82992102520.pdf
    • https://x-software.cz/data/file/mufupiwunegogod.pdf
    • http://deccanquest.com/konadnew/userfiles/file/fafiwejufinudefe.pdf
    • https://event-connections.net/wp-content/plugins/formcraft/file-upload/server/content/files/16089b00a8bcf2---xajepuli.pdf
    • http://es-umzuege-transporte.de/wp-content/plugins/super-forms/uploads/php/files/7f69c4fafc8c0652d358e6c6021e1795/1189377231.pdf
    • http://www.wallisandemmanuel.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606f9a0ff0094---biramaten.pdf
    • http://www.misshandicap.ch/wp-content/plugins/formcraft/file-upload/server/content/files/1607168335e6ca---xemobujep.pdf
    • http://selfmadefilms.nl/userfiles/files/zefobokowe.pdf
    • https://www.crossfitparamaribo.com/wp-content/plugins/formcraft/file-upload/server/content/files/160ba6bc5b024e---tumese.pdf
    • https://mediabandit.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606f307a60da1---pesabevibapazekujipak.pdf
    • https://socialacademy.gr/wp-content/plugins/super-forms/uploads/php/files/d2c67bfbda96a3ab68810097fb17e3e4/41327702901.pdf
    • https://www.rowtheerne.com/wp-content/plugins/super-forms/uploads/php/files/ead92af8bac7d280d50139fa128a9e42/64818264547.pdf
    • http://79.170.40.182/boothtastic.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c1ff6a75810---70139516912.pdf
    • http://beiks.info/public/file/nejijesabazumon.pdf
    • https://pyhm.ca/wp-content/plugins/super-forms/uploads/php/files/0cvhiohvm59ehl8g52dhrc385m/penipam.pdf
    • https://feedproxy.google.com/~r/skout/mBVl/~3/6naE_Nh8_CY/uplcv?utm_term=shall+we+gather+at+the+river+with+lyrics
    • 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_off0000bbca.bin
5d892e802db031a910b17601ad3d9163e2bd9764a82df7cb8c082be1eb06dee2
pdf-font-stream PDF embedded font (sfnt) at offset 0xBBCA 10628 bytes
font_01_sfnt_off0000d44d.bin
a7916a7d1ab30d5aee1a7a835406f5711daacd81db080be6ab0a686ce208e16d
pdf-font-stream PDF embedded font (sfnt) at offset 0xD44D 16700 bytes
font_02_sfnt_off0000ffc2.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0xFFC2 16792 bytes