Malicious PDF — malware analysis report

Static analysis result for SHA-256 c63bb3266c13d318…

MALICIOUS

PDF

88.3 KB Created: 2021-06-29 03:57:40 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 9e6f415b803f0e480b4b43c32dab165d SHA-1: 395becf08182b8c735c1bb12b08e429afbc81820 SHA-256: c63bb3266c13d3186193726e4bd070593e8ddbca614eb0f8efca2a623d0fbf7b
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 it's a phishing or malware distribution lure. It functions as a link farm, containing numerous URLs that point to potentially compromised websites or disposable hosting. The primary purpose appears to be directing users to malicious content or phishing sites, leveraging a large number of external links for this objective.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9835

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://tsg-edinstvo.ru/userfiles/file/dazugarababuwolobijixolod.pdf
    • https://teenvolunteerdallas.org/wp-content/plugins/super-forms/uploads/php/files/19f06a68a0bcfa0d77b0b8d09dc89158/60648536000.pdf
    • http://isgsrl.it/images/file/85478420124.pdf
    • http://www.cuerpomenteyespiritu.es/wp-content/plugins/formcraft/file-upload/server/content/files/16078def996f15---28351546009.pdf
    • https://eduinfinite.com/wp-content/plugins/super-forms/uploads/php/files/9e398e9e5b1d7e000fb23873e97ef09d/35583811614.pdf
    • http://abwgulfport.com/uploads/files/78093083245.pdf
    • https://kvartira-zalog.ru/wp-content/plugins/super-forms/uploads/php/files/44b3b0552beb01631ad1e30aeb884d1c/ravenetutetulo.pdf
    • https://callhfelectric.com/wp-content/plugins/formcraft/file-upload/server/content/files/160ac64dee696f---15716453745.pdf
    • http://koreanhotpot.com/uploads/files/ligudebulamakesinivup.pdf
    • http://ahoba85.com/clients/2/26/26d353b61ac95a99d7df5001a3d58300/File/roket.pdf
    • http://webscape.co.bw/wp-content/plugins/formcraft/file-upload/server/content/files/160b03ca08a8b4---rivokapinawivis.pdf
    • https://www.cr-sdc.org/wp-content/plugins/super-forms/uploads/php/files/0cc83fe6a30d3b92a7fcfdf07c73bb73/baduta.pdf
    • http://jockmurray.com/wp-content/plugins/formcraft/file-upload/server/content/files/160918a7cd4309---61659953801.pdf
    • http://smartraoptics.com/fck_filemanager_upload/file/1521435095.pdf
    • http://champaigncursillo.com/userfiles/file/67459248012.pdf
    • https://swift-tw.com/lcc/upload/files/jupifur.pdf
    • https://mldom.xyz/web/img/podborky/files/xuduruzawujunanob.pdf
    • http://www.absolutecateringla.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c29755b54e3---toropapixorixemusur.pdf
    • https://connect.allianceflooring.net/wp-content/plugins/super-forms/uploads/php/files/2a8e12b0065595cf8a2a07e3fa9272fc/wufej.pdf
    • https://event-connections.net/wp-content/plugins/formcraft/file-upload/server/content/files/1606cc4812c7ee---fevofiwa.pdf
    • https://sckstone.com/wp-content/plugins/super-forms/uploads/php/files/d019d9843438188650d9db553966951a/riloguwewolar.pdf
    • http://simonide.org/userfiles/file/moxarobibaribo.pdf
    • https://dezsredstvompx.ru/wp-content/plugins/super-forms/uploads/php/files/a1793a78f9078b3cf7a15d560c141066/gonetazagiwewu.pdf
    • http://madison62alumni.com/clients/e/e8/e84cd6a5166dbe8c5f6852bff763f4b2/File/4533459708.pdf
    • https://dongytueduc.com/wp-content/plugins/super-forms/uploads/php/files/rs08mpoqbu4bic3p2fu8l50bjm/52352796539.pdf
    • https://ludifrance.fr/userfiles/file/buxokan.pdf
    • http://fly.no1-yes.com/userfiles/file/lorutuvug.pdf
    • https://halobysciton.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608c83696c512---rodipidamusasus.pdf
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/fzgW7-mxBc0/uplcv?utm_term=baked+country+ribs
    • 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_off0000f253.bin
922a90932e4ef46736e656352d0b29d7ca1e8b1cb806c0168f26410335d80cd8		 pdf-font-stream PDF embedded font (sfnt) at offset 0xF253 10816 bytes
font_01_sfnt_off00010b78.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1		 pdf-font-stream PDF embedded font (sfnt) at offset 0x10B78 16792 bytes
font_02_sfnt_off0001238a.bin
def678765bea0e7ca60f82c9a2f7df01a5c12627605b58f7e68616132e08f330		 pdf-font-stream PDF embedded font (sfnt) at offset 0x1238A 18284 bytes

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