Malicious PDF — malware analysis report

Static analysis result for SHA-256 47c81078c7e7775b…

MALICIOUS

PDF

101.1 KB Created: 2021-07-03 03:45:03 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 8577b459b1da0f982faa0e604e4a8979 SHA-1: 5e0ee27e88a80b9ae7d0511b048c8e2b0aa54807 SHA-256: 47c81078c7e7775bbb398461fb2a52152945e723776d1fd435949dc63eab8506
156 Risk Score

Malware Insights

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

This PDF file was flagged by a machine learning classifier and ClamAV as malicious, specifically as a phishing trojan. It contains a link farm pointing to multiple compromised CMS upload locations and disposable hosting, which in turn host other PDF files. The primary purpose appears to be redirecting users to malicious content, likely for phishing or further malware delivery.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9787

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://mrmobilewebsite.agency/wp-content/plugins/super-forms/uploads/php/files/cbe80be73bb131a8be1b457dbeded789/tezekasitamux.pdf
    • https://hyosungulf.com/uploads/file/nobomukarezenudoder.pdf
    • http://visualpaint.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c092391a658---zirip.pdf
    • http://malbreil.com/userfiles/file/dumuk.pdf
    • http://www.tecnotrefg.it/wp-content/plugins/formcraft/file-upload/server/content/files/160870d3e741b5---75625094389.pdf
    • https://tyeetomsfishing.com/userfiles/file/zekiwudeze.pdf
    • https://bettenbaehren.de/wp-content/plugins/formcraft/file-upload/server/content/files/160c14245128e5---92336558216.pdf
    • http://aunay-sous-auneau.fr/ckfinder/userfiles/files/29685624991.pdf
    • http://msinternationalbeautypageant.com/clients/8/8c/8c0f0497d7166b07b5568c04be8084ca/File/bubuvunenuriserefazeziput.pdf
    • https://www.keystonecare.co.uk/wp-content/plugins/super-forms/uploads/php/files/74d6f5a9daddd18b901814de03f750ee/nivojebofok.pdf
    • http://meruzhankhachatryan.com/app/webroot/files/file/74256010994.pdf
    • http://www.sevenchurchestour.net/seven/wp-content/plugins/formcraft/file-upload/server/content/files/160a90bb2db14b---doxiboludivaxebixo.pdf
    • http://www.gainerwindows.ca/wp-content/plugins/super-forms/uploads/php/files/pn0bh3vt5ed0p9a8ulb8tgbmf6/zedowakugusal.pdf
    • http://jamoncup.es/wp-content/plugins/formcraft/file-upload/server/content/files/160851461c9744---virotodawobamikosaxiseram.pdf
    • https://avis-medical.ma/wp-content/plugins/super-forms/uploads/php/files/0525eaecbf3f23de612377e033f7e39a/39154291476.pdf
    • http://www.houstonorientalrug.com/ckfinder/userfiles/files/5516921063.pdf
    • https://advancedcheckcashadvance.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a0452ee8228---tazamikazuno.pdf
    • http://duancanhotot.com/upload/files/90435603037.pdf
    • http://mesotects.com/wp-content/plugins/formcraft/file-upload/server/content/files/16074a43a86307---nonunigasovozu.pdf
    • http://www.miamiairportlimo.net/wp-content/plugins/formcraft/file-upload/server/content/files/160b75181e4d8d---vixapanaki.pdf
    • http://himalayakebab.com/shipinc/userfiles/files/jamexaxawatilizovikuki.pdf
    • http://saludocupacionalpso.com/home/wp-content/plugins/formcraft/file-upload/server/content/files/16099defa0a33f---bowaxujajewumi.pdf
    • http://szpk.hu/_user/file/31246564611.pdf
    • https://stewsites.com/wp-content/plugins/super-forms/uploads/php/files/03d7828c38744624330e93ac1f361596/63272604346.pdf
    • http://www.bestlifepolicy.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/160826b2e17465---78202772099.pdf
    • http://www.barbazan-debat.fr/ckfinder/userfiles/files/93672205987.pdf
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/S30rS-6n6vg/uplcv?utm_term=fast+square+root+c%2B%2B
    • 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_off00012853.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0x12853 16792 bytes
font_01_sfnt_off00014065.bin
66066945f4ea2106606056b6633a02eb0c6984893a599caab55ee5d9d146f397
pdf-font-stream PDF embedded font (sfnt) at offset 0x14065 17708 bytes
font_02_sfnt_off00016e6a.bin
9623c341a794fce40d1dff59a8bc9153f0862caaa123778a1b67b4756b34c809
pdf-font-stream PDF embedded font (sfnt) at offset 0x16E6A 10204 bytes