Malicious PDF — malware analysis report

Static analysis result for SHA-256 3c2067118393d71b…

MALICIOUS

PDF

85.9 KB Created: 2021-07-01 14:16:16 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 11e37b697fdcfae6275245200640c239 SHA-1: cd243824a0a326af4d81c367908242d7a1b67f70 SHA-256: 3c2067118393d71b52a4dd42f7560c4f93f58312471d12ebab568d981828c742
164 Risk Score

Malware Insights

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

The PDF contains a link farm pointing to multiple compromised websites, suggesting an attempt to trick users into downloading malicious files. The ML classifier and ClamAV detection strongly indicate malicious intent. The presence of a 'download button' lure further supports this phishing-like attack pattern.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9942

Heuristics 7

  • 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.
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • 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://staffxrecruitment.com/wp-content/plugins/super-forms/uploads/php/files/36d8723876d87cc8d8a4de459b0ab687/79482952763.pdf
    • https://larioenergy.net/uploads/file/gejezujulefovomilut.pdf
    • http://munsusa.org/userfiles/file/20210519001346.pdf
    • http://msci.com.ng/wp-content/plugins/formcraft/file-upload/server/content/files/160bec373cc4b5---fakeluj.pdf
    • http://beetsom.com/PROGRAM_FCKeditor_UserFiles/file/79435225360adde281153f.pdf
    • http://opalsolar.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/1607777acc7e66---nekujadudefasoniralujeti.pdf
    • https://www.truesdalepainting.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606f673c1e671---lorulezekoxinus.pdf
    • http://akbmodel.com/wp-content/plugins/formcraft/file-upload/server/content/files/16084cedd5163e---9635638269.pdf
    • https://agatanorek.com/files/file/64378708360.pdf
    • http://leton.pl/userfiles/file/liludafaxiwodifur.pdf
    • https://40parables.com/wp-content/plugins/super-forms/uploads/php/files/1f3fd364c9a4898d8ccef0b0439241e5/6321653118.pdf
    • https://advicezone.org.uk/wp-content/plugins/super-forms/uploads/php/files/dllqqvqfort2opnbsoaapcckbb/zefosusetabil.pdf
    • http://transcash.com/ci/userfiles/files/62920332823.pdf
    • http://xn----8sbpvg0afdbe.xn--p1ai/wp-content/plugins/super-forms/uploads/php/files/73fbnpopb2knf03qspq69bjmk0/kutowazak.pdf
    • https://asiaviews.org/wp-content/plugins/super-forms/uploads/php/files/n4sct2rv5u38cs377a18ve9l74/mofawejazeludezakawoti.pdf
    • http://asea-admin.com/_userfiles/file/20210502154724.pdf
    • https://baohohoanglong.com/userfiles/file/37540055569.pdf
    • http://commune-bourre.com/userfiles/file/vigowated.pdf
    • https://avenue102.com/uploads/file/noweri.pdf
    • https://bookatowncar.com/userfiles/file/64768895407.pdf
    • http://toonesk.com/upload/51575226605.pdf
    • http://e-skala.pl/userfiles/file/sagusidobidapazu.pdf
    • http://3duct.com/wp-content/plugins/formcraft/file-upload/server/content/files/160bf78bc33397---59256785521.pdf
    • http://thefutureofgolf.eu/wp-content/plugins/formcraft/file-upload/server/content/files/160b2813ba8c0b---63890198028.pdf
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/fzgW7-mxBc0/uplcv?utm_term=weight+lbs+to+kg
    • http://crossfit28.com.s125853.gridserver.com/siteuploads/editorimg/file/kosuvasitobazefer.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_off0000edfa.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0xEDFA 16792 bytes
font_01_sfnt_off0001060c.bin
9df72f68cdfc007a92782b4e57746b3999ef91a7e36f2acc6ec9a3626c4d963a
pdf-font-stream PDF embedded font (sfnt) at offset 0x1060C 17408 bytes
font_02_sfnt_off00013364.bin
293b81ee90ef98119b285c2a168209f6e4a905f46ed36480f2d043dbf6f82d34
pdf-font-stream PDF embedded font (sfnt) at offset 0x13364 10244 bytes