Malicious PDF — malware analysis report

Static analysis result for SHA-256 8febce1756191689…

MALICIOUS

PDF

79.3 KB Created: 2021-08-15 06:02:07 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-31
MD5: 0d4092f28301f094877c698ef9f6dfb6 SHA-1: c7c0bb05acaa518a65c5ab6a250dcb969724c201 SHA-256: 8febce17561916899c1c27b99a9c123ce48adf5a6e4f38e6a718cdef65834d80
156 Risk Score

Malware Insights

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

This PDF was identified as malicious by ML classifiers and ClamAV, specifically flagged as a phishing trojan. It functions as a link farm, hosting numerous PDFs on compromised WordPress sites and disposable hosting, likely to lure victims into downloading further malicious content. The embedded URLs and the PDF structure strongly indicate a phishing or malware distribution campaign.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9987

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://www.1000ena.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a5ec593296d---vuralanoli.pdf In PDF document text
    • http://kolesnikov.pro/ckfinder/userfiles/files/maxenupapujexagelira.pdfIn PDF document text
    • http://www.nanodrywash.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609d19368edb2---tamopinefivose.pdfIn PDF document text
    • http://www.allatpatikapecs.hu/images/file/totatobex.pdfIn PDF document text
    • http://linkipt.com/_UploadEditor/files/33380697522.pdfIn PDF document text
    • http://melissajacksonmd.com/wp-content/plugins/formcraft/file-upload/server/content/files/160f9e0b10fbe7---penomimaturagikitejo.pdfIn PDF document text
    • http://kasintorn.com/images/upload/files/4002598594.pdfIn PDF document text
    • http://scenekunstskolen-efteruddannelsen.dk/ckfinder/userfiles/files/22467866055.pdfIn PDF document text
    • http://gocreate.termall.pl/upload/fck/file/sikubuxisegisafeme.pdfIn PDF document text
    • https://beauti-full.ru/uploads/files/sogisixoxewavizuminisom.pdfIn PDF document text
    • https://beachesbrewing.com/wp-content/plugins/super-forms/uploads/php/files/6325570b49e8ae17e13aecb5322f9eee/83576245132.pdfIn PDF document text
    • http://wernitznigg.at/files/1320941135.pdfIn PDF document text
    • https://www.hotelrestaurantmacarena.fr/ckfinder/userfiles/files/37376470903.pdfIn PDF document text
    • https://www.elitelawnsolutions.co.uk/wp-content/plugins/super-forms/uploads/php/files/gaub1gjrmmcd6g7sfasj9p3iok/5963131403.pdfIn PDF document text
    • http://reversetheclocknow.com/ckfinder/userfiles/files/44788428258.pdfIn PDF document text
    • https://t2sc.me/userfiles/tazumakorezupelipifapilew.pdfIn PDF document text
    • https://tehnol.ru/wp-content/plugins/formcraft/file-upload/server/content/files/160a58e9fd8f06---35510596675.pdfIn PDF document text
    • https://www.jedeminute.de/wp-content/plugins/super-forms/uploads/php/files/s983ev3f88fctaf2f23vked7ri/fofuluboxosurebomotur.pdfIn PDF document text
    • https://www.davinci.dk/wp-content/plugins/formcraft/file-upload/server/content/files/16098a02d37c5b---pabowixupogusan.pdfIn PDF document text
    • http://www.communityheroesproject.org/wp-content/plugins/formcraft/file-upload/server/content/files/160fd6148a888f---92295469189.pdfIn PDF document text
    • https://agribusiness.pk/wp-content/plugins/formcraft/file-upload/server/content/files/160ba83dcd952d---kibopep.pdfIn PDF document text
    • http://hncastlecable.com/d/files/64121857573.pdfIn PDF document text
    • http://emirates-offshore.com/uploads/image/file/51385062364.pdfIn PDF document text
    • http://cedule-plachty.cz/files/file/fogobufomakoxixejijonum.pdfIn PDF document text
    • http://ahcxdq.com/uploads/file/170556438661.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/1xuhb7AK25c/uplcv?utm_term=multiplexeur+2+vers+1+vhdlPDF 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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000d053.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD053 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000e86a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE86A 10536 bytes
SHA-256: d3c42a9e46ab3eed6d7d4065c4414d979d298a4312d4f33c996164d8ca2ead74
font_02_sfnt_off000100a6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x100A6 17760 bytes
SHA-256: 1058c2ddad05b555d71a9f95faa89c0f0431643d1c69e53f392125c42151c061