Malicious PDF — malware analysis report

Static analysis result for SHA-256 7afea4f28904f934…

MALICIOUS

PDF

85.5 KB Created: 2021-06-30 22:52:12 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: ccf63344f78d66b599fa68362e091d76 SHA-1: 0034bd0261ecfd6651deac3bcf4b2bcc7f7fb41c SHA-256: 7afea4f28904f93490bfaf58991b97835b09bdbf098ee938094a53e27bd86de2
156 Risk Score

Malware Insights

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

This PDF file was flagged by ClamAV as Pdf.Phishing.Trojan and by an ML classifier, indicating malicious intent. It contains numerous links to external websites, many hosted on compromised WordPress installations, suggesting it functions as a link farm to distribute malicious content or conduct phishing. The presence of multiple PDF_SEO_DISPOSABLE_LINK_FARM heuristics further supports this, indicating a tactic to obscure the true destination of the links.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9956

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://adbadog.com/wp-content/plugins/super-forms/uploads/php/files/95447f34cfe7d9223e1df9029ba3b155/24159374676.pdf
    • https://alphacleanwashing.com/wp-content/plugins/super-forms/uploads/php/files/da432de6972e19c8ddbf9ed0db55b245/62720427935.pdf
    • https://dfa-finanz.de/wp-content/plugins/formcraft/file-upload/server/content/files/1608e4f4ce8a61---58482020619.pdf
    • https://www.cr-sdc.org/wp-content/plugins/super-forms/uploads/php/files/c34d41537b31558c20343453744e0319/xudapaf.pdf
    • http://andreagarciam.com/wp-content/plugins/formcraft/file-upload/server/content/files/160707db0ce502---93355369066.pdf
    • https://www.opdrrustukalac.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b0956856a30---xuxixip.pdf
    • http://clarksville.net/wysiwygfiles/file/39535014173.pdf
    • https://jdbailbonds.com/wp-content/plugins/super-forms/uploads/php/files/6d9de8ed100c18c7de911531e8365337/miwiregewojepezubufejedos.pdf
    • http://kwartetproforma.com/userfiles/file/86989028345.pdf
    • http://www.gunyagder.org.tr/wp-content/plugins/super-forms/uploads/php/files/ql7ehurapth6b2gn0acs6a1tv0/fitefeseluxatupokosezu.pdf
    • https://activepymes.com/pub/file/jutizog.pdf
    • https://www.isnb.co.uk/wp-content/plugins/super-forms/uploads/php/files/2b45430b65c808aa8988a273376487fe/57290927218.pdf
    • https://aawyx.com/sites/default/imageuser/file/nojufixuziv.pdf
    • http://www.aluvascientific.com/UserFiles/file/mapuwa.pdf
    • https://www.isgs.org/wp-content/plugins/super-forms/uploads/php/files/2275b29605a42305fbd200f5d77a35b8/72553339920.pdf
    • https://anpheatingandac.com/nbloom/fckuploads/file/96577874159.pdf
    • http://cohn-vossen.com/wp-content/plugins/formcraft/file-upload/server/content/files/160bfc735179ac---20303619542.pdf
    • https://controlcert.se/wp-content/plugins/formcraft/file-upload/server/content/files/1607febf6ccb74---tidabo.pdf
    • https://personalloan2u.com/wp-content/plugins/super-forms/uploads/php/files/e4f56046845b15052b55a2dc0f87c3f5/56353680004.pdf
    • https://srmhospitalities.com/images/bulk_images/files/mubolap.pdf
    • http://www.ibadirect.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a7568e47c1c---tafizovevujebazizore.pdf
    • http://adabaskimerkezi.com/upload/file/muwilupugafoguzila.pdf
    • https://sumangold.net.vn/wp-content/plugins/super-forms/uploads/php/files/eigdovctij8cn5uhuk5f723quq/remawajawebedimexekife.pdf
    • https://feedproxy.google.com/~r/Uplcv/~3/6naE_Nh8_CY/uplcv?utm_term=upper+back+pain+and+pain+when+breathing
    • 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_off0000ef2e.bin
19170527690531f0207842d6bea8ca9ef5a965f07daa7983c8f48fd0d4042673		 pdf-font-stream PDF embedded font (sfnt) at offset 0xEF2E 15940 bytes
font_01_sfnt_off00011851.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1		 pdf-font-stream PDF embedded font (sfnt) at offset 0x11851 16792 bytes
font_02_sfnt_off00013068.bin
c49eccc16499494b7fee0c0b27ecc3835b54ee995d6c48051cfa6aaf231df3a7		 pdf-font-stream PDF embedded font (sfnt) at offset 0x13068 10784 bytes

Open this report in the interactive analyzer, or submit your own file for analysis.