Malicious PDF — malware analysis report

Static analysis result for SHA-256 7af1b33607ecb826…

MALICIOUS

PDF

70.7 KB Created: 2021-09-04 23:09:05 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-14
MD5: 2c5ecc13254e76a21128e8b1b0b21b9f SHA-1: 37b6df237fed29f71e24194bcfde4ebd2313e56a SHA-256: 7af1b33607ecb8262086be0aaee5c4e0d372c05b4683891f4740901a88949f1b
154 Risk Score

Malware Insights

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

The PDF contains numerous embedded URLs, many of which point to compromised CMS upload directories. Heuristics indicate this is a link farm, likely designed to lure users to malicious sites for phishing or malware. ClamAV detection as 'Pdf.Phishing.Trojan' further supports a malicious classification. No scripts were extracted, and the document body was unreadable.

Machine Learning

  • Nyx PDF Classifier malicious score 0.5354

Heuristics 5

  • 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
  • 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://willbramephotography.com/fitazuvusu.pdf In PDF document text
    • https://svetpoznaniyaonline.ru/wp-content/plugins/super-forms/uploads/php/files/bb94845bd16dcabae95be9d7de3b9528/52808922984.pdfIn PDF document text
    • https://tenshinorchids.com/FCKeditor_upload/file/bowijutetevaxusagumetosu.pdfIn PDF document text
    • http://southportrubbish.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a57399c20b6---jejamagevajinixudunepo.pdfIn PDF document text
    • http://lawcab.ru/wp-content/plugins/formcraft/file-upload/server/content/files/160b90567a53fa---60654707438.pdfIn PDF document text
    • https://thefertilizerequipment.com/d/files/23527550240.pdfIn PDF document text
    • http://www.stockholmswingallstars.com/wp-content/plugins/formcraft/file-upload/server/content/files/160cfda35c4cfa---70887686159.pdfIn PDF document text
    • http://socialbomjesus.org.br/wp-content/plugins/formcraft/file-upload/server/content/files/160a79abed69e5---zafedabexuzelogovixoxozeg.pdfIn PDF document text
    • https://realestateconnect.biz/wp-content/plugins/super-forms/uploads/php/files/ldlo2pt6tmqeql5ceqekq33dj5/zuvutezawagorekubiko.pdfIn PDF document text
    • http://erdivigado.hu/userkepek/file/9423786642.pdfIn PDF document text
    • https://amesmedicalservices.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a942b28f1df---givitizadowogilitawav.pdfIn PDF document text
    • https://doctorchina168.com/upload/files/fevusufajupexuzuwixe.pdfIn PDF document text
    • http://rayzerfamilyreunion.com/clients/0/08/08e2d5bcffca37c2e1a82d364f4296c6/File/bijaluxadipagavuv.pdfIn PDF document text
    • http://mountmedpharmacy.co.za/wp-content/plugins/formcraft/file-upload/server/content/files/1607e6d2e9652f---12642067515.pdfIn PDF document text
    • https://eliteplacementagency.com/uploads/files/supupozedinofudedivela.pdfIn PDF document text
    • https://www.projectorrentals.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606d55c6e6c2f---guwalekuw.pdfIn PDF document text
    • https://cytairtool.com/test/userfiles/file/20210619_8328c.pdfIn PDF document text
    • http://alrehabourhome.com/userfiles/files/21967595342.pdfIn PDF document text
    • http://bensonlandscape.com/editorData/file/giguvu.pdfIn PDF document text
    • http://asirius.su/wp-content/plugins/super-forms/uploads/php/files/5c77e480dde5acef4ef8a006a9802b25/52897600254.pdfIn PDF document text
    • https://watertorens.nl/userfiles/file/16768420101.pdfIn PDF document text
    • http://www.deco-interieure.com/userfiles/file/gafuzakegi.pdfIn PDF document text
    • http://www.iece.in/userfiles/file/tixanuguwoges.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/1KS0DP0cxss/uplcv?utm_term=scame+isolator+catalogue+pdfPDF link annotation
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000c1fd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC1FD 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000da14.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDA14 11036 bytes
SHA-256: a8fbf7bca674f763ddff91b954c47e324f828acbff83757860ce33f615185e11
font_02_sfnt_off0000f389.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF389 17756 bytes
SHA-256: 5ddbf23d0f6013f7b5e632832d72131585e3c18983b0873c084762a624579fbe