Malicious PDF — malware analysis report

Static analysis result for SHA-256 0796fee9938aff9c…

MALICIOUS

PDF

86.1 KB Created: 2021-07-30 22:07:59 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-07
MD5: 71991e90ff4a5a3ac716f555af6bcab0 SHA-1: dd3a6a9b9a2d4b36177901599e24d4389bfa18cb SHA-256: 0796fee9938aff9c99b04b15ac38709787846d7356cebd7485d5b0d503c87e6a
156 Risk Score

Malware Insights

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

The PDF document contains a link farm, directing users to multiple external URLs, some of which are also PDFs hosted on compromised WordPress sites. The ML classifier and ClamAV detection strongly indicate malicious intent, likely for phishing or distributing further malware. No scripts were extracted, so the primary attack vector appears to be social engineering through malicious links.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9952

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://prsnashville.com/wp-content/plugins/super-forms/uploads/php/files/ebcc1eee22a5449ac94ebe5315d059f8/42151326763.pdf In PDF document text
    • https://motelandratecuci.ro/userfiles/file/sorumolum.pdfIn PDF document text
    • https://vegan-eshop.cz/data/file/27540770380.pdfIn PDF document text
    • https://hotellemaritime.com/hotel/upload/files/26771899451.pdfIn PDF document text
    • https://hoovermaids.com/wp-content/plugins/super-forms/uploads/php/files/89615eef90010ad6fdc25a861bb552cf/febigawirut.pdfIn PDF document text
    • http://www.alcera.ca/userfiles/file/73158915761.pdfIn PDF document text
    • https://kuechentreff-schmid.de/wp-content/plugins/super-forms/uploads/php/files/8995dtm0h83ncfeon3clm5ckek/77044071118.pdfIn PDF document text
    • https://allcreaturesinc.com/files/files/wabod.pdfIn PDF document text
    • http://renovfab-menuiserie.com/userfiles/file/felilirodakurerezibunab.pdfIn PDF document text
    • http://falls67.com/clients/50406/File/5891639600.pdfIn PDF document text
    • http://skrabl.pl/www/rpbd/fck/file/20406520382.pdfIn PDF document text
    • http://kesifveotesi.com/files/32213744800.pdfIn PDF document text
    • http://bizwd.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608f3c1574ab6---sopapizezagezizowiboromit.pdfIn PDF document text
    • https://yziact.fr/wp-content/plugins/super-forms/uploads/php/files/9fd1ajrd06ng76trmp0t1l5end/sasolejopav.pdfIn PDF document text
    • https://kga-am-adlergestell-ev.de/kga/ckfinder/userfiles/files/gofozijarab.pdfIn PDF document text
    • http://cobansut.com/userfiles/file/zumuselewafux.pdfIn PDF document text
    • http://uyaviation.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b4096bd505e---fijepu.pdfIn PDF document text
    • http://www.virtualaid.eu/wp-content/plugins/formcraft/file-upload/server/content/files/160afe31ca15c2---62704248951.pdfIn PDF document text
    • https://ketgate.eu/wp-content/plugins/super-forms/uploads/php/files/c7c3f25a4dbe2b2cdd519ee26f27f696/gamusaxijovuwenajizujoruw.pdfIn PDF document text
    • http://sh8ke.com/wp-content/plugins/formcraft/file-upload/server/content/files/16072ca1913802---gajunisipopu.pdfIn PDF document text
    • https://backcountryplayground.com/wp-content/plugins/super-forms/uploads/php/files/5b10e9a15720245c6ab98f46e610ea34/74308509488.pdfIn PDF document text
    • https://isabellepieman.com/userfiles/file/45330951331.pdfIn PDF document text
    • http://adabaskimerkezi.com/upload/file/kefito.pdfIn PDF document text
    • http://n2nlah.org/UserFiles/file/90349077401.pdfIn PDF document text
    • https://psychologgia.pl/Upload/file/22967387436.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/GLLx1DTH0VQ/uplcv?utm_term=hioki+3197+driver+for+windows+7PDF link annotation
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#In PDF document text
    • http://purl.org/dc/elements/1.1/In PDF document text
    • http://ns.adobe.com/pdf/1.3/In PDF document text
    • http://ns.adobe.com/xap/1.0/In PDF document text
    • http://ns.adobe.com/xap/1.0/mm/In PDF document text
    • http://ns.adobe.com/xap/1.0/rights/In PDF document text
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000df17.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDF17 10720 bytes
SHA-256: 17f7816ea253c1d8fc59ccfc36fa8c908177d3f1c4debad5cfd3dff5c52f0133
font_01_sfnt_off0000f7fe.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF7FE 18392 bytes
SHA-256: ec8e0525d254b95493297f88eac8d4fc985f277e31625418de456f336d23238e
font_02_sfnt_off000127fd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x127FD 1912 bytes
SHA-256: 21bd4174b465c237cf211b55828da52758340bea9202ffa795cda2f998bdb5a7
font_03_sfnt_off000130e2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x130E2 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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