Malicious PDF — malware analysis report

Static analysis result for SHA-256 47c7f2086fe72199…

MALICIOUS

PDF

90.8 KB Created: 2021-08-07 20:22:15 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 9e4c0a683c090972a8034f224f808590 SHA-1: aeacc75c7a7f10b864bc62d92fbfd41b7b910da9 SHA-256: 47c7f2086fe72199a03be9539cc08890c35eec2308fda44a9b3b7e2edb13b993
156 Risk Score

Malware Insights

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

This PDF file was identified as malicious by ML classifiers and ClamAV, indicating a phishing or trojan threat. It functions as a link farm, with numerous embedded URLs pointing to compromised WordPress sites, likely intended to redirect users to malicious content or downloads. The presence of multiple links on disposable hosting and compromised CMS upload storage further supports a malicious intent.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9973

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 http://xn--b1ahhafccpgkb2bxo.xn--p1ai/wp-content/plugins/super-forms/uploads/php/files/45049b449ada24ccde7e9661368b5e0d/86280703336.pdf
    • https://www.dyna-tech.nl/wp-content/plugins/formcraft/file-upload/server/content/files/160b5d478801c4---54343455073.pdf
    • https://www.rydalmereprestige.com.au/wp-content/plugins/super-forms/uploads/php/files/om3tuhe9o7lu0ma8nrpnn66u5e/vunikarisu.pdf
    • https://www.escon.it/wp-content/plugins/super-forms/uploads/php/files/7e2db8ccff95faa1f6901c99caa12849/wixusegezun.pdf
    • https://www.hungarianassociation.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c1f02ea8d35---90709536661.pdf
    • https://www.adelaarenergy.com/wp-content/plugins/super-forms/uploads/php/files/g63ohc9rqccs3fr7mj8anvcbsb/24195614764.pdf
    • http://uyaviation.com/wp-content/plugins/formcraft/file-upload/server/content/files/16071df958838e---gaxete.pdf
    • http://ngpsusa.com/wp-content/plugins/super-forms/uploads/php/files/fcncuv7v6goq392km3ckeap370/85506406275.pdf
    • http://studiomilano.eu/userfiles/files/fedivakoxusewimowufetesug.pdf
    • https://kp-bs.ru/upload/files/navotolaxa.pdf
    • http://renknh.com/ckupload/files/mogajowub.pdf
    • http://www.dereformasenalicante.com/archivos/files/94568418862.pdf
    • https://wccia-vastu.com/wp-content/plugins/super-forms/uploads/php/files/e6507ac2cded727996ab8e9f5e4772e7/jatixanawakodoxulul.pdf
    • https://www.chortho.co.uk/wp-content/plugins/super-forms/uploads/php/files/15f76rr1n73rfvdc88fode60lq/53850140481.pdf
    • http://websurin.net/UserFiles/File/kiposikibozefa.pdf
    • https://www.digitalsofts.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a1163227e38---nufewosuwo.pdf
    • https://vmkstroi.ru/wp-content/plugins/super-forms/uploads/php/files/b558041ca163a831b28901d7e8ed8ae2/8571020595.pdf
    • https://coimbatorepressclub.com/FCKeditor/userfiles/file/48043120966.pdf
    • https://www.budgetskemaet.dk/wp-content/plugins/formcraft/file-upload/server/content/files/160f6ba92a9bf5---wijikusux.pdf
    • http://sunarfactory.com/userfiles/files/xesudilan.pdf
    • https://maydongy.com/wp-content/plugins/super-forms/uploads/php/files/398t9ocsde91tffqg8gql88g4g/74757540272.pdf
    • https://teenvolunteerhouston.com/wp-content/plugins/super-forms/uploads/php/files/ae9fd0eac4026263887ecb4afcb28ba9/tubajinoginog.pdf
    • https://cedarcreeksauce.com/wp-content/plugins/super-forms/uploads/php/files/e155ab5e0ab09bf802a83c97f9836e41/8500226944.pdf
    • http://www.finanzanlagen-honorarberatung.de/wp-content/plugins/formcraft/file-upload/server/content/files/160948b4c30ad1---78783139726.pdf
    • https://observatoire-omic.org/documents/file/92738446736.pdf
    • https://feedproxy.google.com/~r/Uplcv/~3/cv9VXjIrmdE/uplcv?utm_term=what+are+the+basic+differences+between+alpha+helix+and+beta+pleated+sheet
    • 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_off0000fd6f.bin
2296871db450b7d40d635fe47228577f5810cd6175dbf392314d6047c887e6e0
pdf-font-stream PDF embedded font (sfnt) at offset 0xFD6F 10916 bytes
font_01_sfnt_off0001167a.bin
eed6e305690cf795675d9060db0e40f3962bb889ed3a2c99e9a6799e74f75cd9
pdf-font-stream PDF embedded font (sfnt) at offset 0x1167A 17768 bytes
font_02_sfnt_off000144c3.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0x144C3 16792 bytes