Malicious PDF — malware analysis report

Static analysis result for SHA-256 aafdc1fe7221948d…

MALICIOUS

PDF

76.2 KB Created: 2021-06-30 21:48:59 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-11-21
MD5: e5044e989eddeef21cbda3f6b01f90f7 SHA-1: 3c57c09d02438d4386e719bcf3a77c32700f5d1e SHA-256: aafdc1fe7221948d16cef709fc65efea6901faa83aa3b92421e32849270fd912
124 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains multiple links to external websites, many of which are hosted on compromised WordPress installations. These links are designed to trick the user into downloading further malicious content, likely by masquerading as a required PDF viewer or update. The ClamAV detection as 'Pdf.Phishing.Trojan' further supports a phishing and trojan delivery intent.

Machine Learning

  • Nyx PDF Classifier suspicious score 0.4750

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 https://synerhu.ru/uplcv?utm_term=cant+open+pdf+android PDF link annotation
    • https://law.myvzl.com/wp-content/plugins/super-forms/uploads/php/files/qr1ueqhcg0q7b4921tgbekh83q/sevosiwojawekupujebulav.pdfIn PDF document text
    • http://progfin.pl/userfiles/file/jezululijagovosimufolef.pdfIn PDF document text
    • https://propertiproperty.com/Uploads/userfiles/files/zokibi.pdfIn PDF document text
    • https://inchiriereelicoptere.ro/wp-content/plugins/formcraft/file-upload/server/content/files/16089342c6c637---22366315218.pdfIn PDF document text
    • https://www.femregenx.co.za/wp-content/plugins/super-forms/uploads/php/files/bpe5ang2egguoj8vs6jt0ov372/voduxokuzunoguxute.pdfIn PDF document text
    • https://sf-tfi-pgu.uz/wp-content/plugins/super-forms/uploads/php/files/77451b315c7c8b8dfba0ff7ff69e5689/dogunuxutekapa.pdfIn PDF document text
    • http://discoveryenglish.org/wp-content/plugins/formcraft/file-upload/server/content/files/1606f46cb6dd89---dutazokajaditobelaliwazaj.pdfIn PDF document text
    • https://traveletrust.com/basefile/traveletrustcom/files/13587534417.pdfIn PDF document text
    • https://sipare.com.ar/wp-content/plugins/super-forms/uploads/php/files/ivgt6oic0h51vihc0875ol1to3/99076007116.pdfIn PDF document text
    • https://www.vedaaz.com/wp-content/plugins/super-forms/uploads/php/files/c0cc33b151ba44b1b6acdfb249c3073d/divibusot.pdfIn PDF document text
    • http://eske.hu/wp-content/plugins/formcraft/file-upload/server/content/files/160c25317bcdf2---10078558717.pdfIn PDF document text
    • http://springswellness.net/wp-content/plugins/formcraft/file-upload/server/content/files/1607bf1e656c4b---jugejokikukomug.pdfIn PDF document text
    • http://reclaimsplus.com/wp-content/plugins/super-forms/uploads/php/files/7cbedb244766bc47cdb9a9636c24fc42/10739928432.pdfIn PDF document text
    • https://quickonboarding.com/wp-content/plugins/super-forms/uploads/php/files/ae7bccf19fdeed751f55fba7b3e9069d/gipevematujudevasadikub.pdfIn PDF document text
    • https://pinpointfeedtech.com/ckfinder/userfiles/files/fezofetikedinedaxasefezu.pdfIn PDF document text
    • http://www.tobywells.org/media/fckdir/file/79044068631.pdfIn PDF document text
    • http://pinxedien.net/upload/files/jimevowu.pdfIn PDF document text
    • http://endustriyelkiralama.com/wp-content/plugins/super-forms/uploads/php/files/9i5h1q2on4dar5e86e4bn1jacm/52928558601.pdfIn PDF document text
    • http://travellightnepal.com/userfiles/file/34227257315.pdfIn PDF document text
    • http://principessavencanice.com/wp-content/plugins/formcraft/file-upload/server/content/files/160890ba6d9746---56794256978.pdfIn PDF document text
    • http://garmagostaran.com/Upload/file/migavexo.pdfIn PDF document text
    • http://fsgpj.com/upfolder/e/files/20210623190826.pdfIn PDF document text
    • https://regeneracion-capilar.com/wp-content/plugins/super-forms/uploads/php/files/f4d91b16571838ab746c5441b6fbfcf3/59969640543.pdfIn PDF document text
    • https://harkakotony.hu/UserFiles/file/pujekovobid.pdfIn PDF document text
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e452.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE452 10308 bytes
SHA-256: bcc74655e7e4987c582932707260c65c0e91adf1fa580343a93eed7316fdba35
font_01_sfnt_off0000fba9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFBA9 16864 bytes
SHA-256: 78ccda05d9235a549a39078b65e06845153e5bc9867ec3dab56cc563c30f1ef2