Malicious PDF — malware analysis report

Static analysis result for SHA-256 94b5b1a01971a613…

MALICIOUS

PDF

91.8 KB Created: 2021-07-03 05:18:09 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 15712ff283191ddb939d7288c1cea4be SHA-1: 516ebb8985a04d72ecc0627165dc8bac43e0f1f8 SHA-256: 94b5b1a01971a6138870c24d035062930a0e817ef3000626e0f01c545e792f37
156 Risk Score

Malware Insights

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

This PDF was flagged by ClamAV as Pdf.Phishing.Trojan and by an ML classifier, indicating malicious intent. It contains numerous embedded URLs pointing to compromised WordPress sites and disposable domains, functioning as a link farm. The primary purpose appears to be directing users to malicious content, likely for phishing or malware delivery.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9835

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://crewmak.ru/uplcv?utm_term=what+does+double+or+nothing+mean+in+a+bet
    • https://aedwea.com/upload/foto/11470698798.pdf
    • https://kolodezrus.ru/wp-content/plugins/super-forms/uploads/php/files/703b66c1382ba8a01bf313e748c2d3f0/55503448603.pdf
    • https://hoakhanh.vn/uploads/image/files/dedozizulaguxi.pdf
    • https://lion-trading.co.uk/wp-content/plugins/super-forms/uploads/php/files/lbm9d782j38j9jh22g8q1ablk4/dubomilo.pdf
    • https://yuss.it/file/21856284145.pdf
    • http://thuephotocopytaihanoi.com/upload/files/pumemadaranelajasozojiwam.pdf
    • http://namthangbasaltstone.com/uploads/image/files/95962990119.pdf
    • http://projectbudapest.hu/wp-content/plugins/formcraft/file-upload/server/content/files/16094d3fcc4d3b---resixoliruzakokusa.pdf
    • https://elektrona.cz/files/file/54123329679.pdf
    • http://dzbnf.com/upload/file///3800596807.pdf
    • https://nothingbutsafetyglasses.com/userfiles/file/29840555787.pdf
    • https://iamluno.com/wp-content/plugins/formcraft/file-upload/server/content/files/160dccdee36fbe---kuwexelosudazaduzon.pdf
    • http://adveotec.com/img/file/68542402697.pdf
    • https://aitalk.vn/upload/files/wowakewibotikemito.pdf
    • https://opuntia.eu/wp-content/plugins/super-forms/uploads/php/files/de36c7ad8df9e1a6f8c73f08c27018fd/sawoluxezinupoduf.pdf
    • https://israelonthehouse.com/wp-content/plugins/formcraft/file-upload/server/content/files/160bad2872436c---gemudajitunoxemukok.pdf
    • http://texmet.pl/userimages/file/vujosasawima.pdf
    • https://www.novet.de/wp-content/plugins/formcraft/file-upload/server/content/files/160b84a351ef2d---91890091104.pdf
    • http://conwaychristian.org/wp-content/plugins/formcraft/file-upload/server/content/files/160af713a80270---rumupafepivanid.pdf
    • http://www.restorationservice.ca/wp-content/plugins/formcraft/file-upload/server/content/files/160cabf7e42761---kotusu.pdf
    • https://forcechicago.com/wp-content/plugins/super-forms/uploads/php/files/c8f25a1df9f919b81289575a4a18aaa6/fuzuduvurojo.pdf
    • https://www.propertyfilevault.com/wp-content/plugins/super-forms/uploads/php/files/bf738081ace377212514e30684033dce/buzukamemaboz.pdf
    • https://www.karenlovelee.com/wp-content/plugins/formcraft/file-upload/server/content/files/160afbe5789579---29553172624.pdf
    • http://amajyuku.com/files/files/35713014322.pdf
    • https://www.tctnanotech.com/wp-content/plugins/super-forms/uploads/php/files/08562b90adb5d96c9fe80c789c4591b8/xudaxumimekavimemelatuvem.pdf
    • http://kaplanpm.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608817bce17a9---zegetevogefudanon.pdf
    • 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_off0000feef.bin
58dc05f546696fc8a3c3cf45af40961cf059d09bd24ddf5c087d17932b6be045
pdf-font-stream PDF embedded font (sfnt) at offset 0xFEEF 10928 bytes
font_01_sfnt_off000117d0.bin
d7d5049fe2256472b7d6d6c639d8e806e576ce05b0458f5d3780a350f56d40a1
pdf-font-stream PDF embedded font (sfnt) at offset 0x117D0 18108 bytes
font_02_sfnt_off000147d1.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0x147D1 16792 bytes