Malicious PDF — malware analysis report

Static analysis result for SHA-256 63c49b02c961c634…

MALICIOUS

PDF

98.5 KB Created: 2021-09-08 09:45:46 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-07
MD5: 83132c175b567bb6d7db69a4f634a95f SHA-1: 17c2f7d717d8e2d0463e8b886ab47de5b687d342 SHA-256: 63c49b02c961c634d7cc2583b0d10458f81480f2f934a318bf535223a2c426b4
124 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file was detected as malicious by ClamAV, specifically as a phishing trojan. Heuristics indicate it functions as a link farm, with many URLs pointing to potentially compromised CMS uploads and disposable hosting. While no scripts were explicitly extracted, the PDF structure itself may contain embedded JavaScript for malicious redirection or exploitation, aligning with T1059.007. The overall pattern suggests a phishing attempt or malware distribution vector, likely delivered via spearphishing attachment (T1566.001).

Machine Learning

  • Nyx PDF Classifier clean score 0.1206

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://www.baptistenhardenberg.nl/wp-content/plugins/formcraft/file-upload/server/content/files/160e5d75da202a---legutateretalipetoxijow.pdf In PDF document text
    • https://gionggiacam.gagiongvitgiong.com/ckfinder/userfiles/files/fikinukokatowobawaguziduz.pdfIn PDF document text
    • http://biomisszio.hu/tmp/21594218640.pdfIn PDF document text
    • http://www.auditsi.com/wp-content/plugins/formcraft/file-upload/server/content/files/160798a322a7bd---76959130587.pdfIn PDF document text
    • http://mijneigenlift.nl/wp-content/plugins/formcraft/file-upload/server/content/files/1611f053f773d3---8375728296.pdfIn PDF document text
    • http://sad-azov.ru/wp-content/plugins/super-forms/uploads/php/files/a256b2c5f5a919692a30b7360a3e492c/futiwutufibifiwa.pdfIn PDF document text
    • http://dgjst.com/upfile/file/zuxobitijifumunotutam.pdfIn PDF document text
    • https://beliangka.com/contents//files/24797991497.pdfIn PDF document text
    • https://bistro-8.com/wp-content/plugins/super-forms/uploads/php/files/e2e22b35f1ab489651b739fbc166a343/49050258333.pdfIn PDF document text
    • http://mu-rrrc.com/userfiles/file/xamijujabakakenilekomej.pdfIn PDF document text
    • http://mdbim.pl/ubezpiecz/obrazy/file/runipuvotowofetewiwura.pdfIn PDF document text
    • http://firegallery.ru/img/upload/dovadufadav.pdfIn PDF document text
    • http://hayatteknoloji.com/webimage/file/59039958810.pdfIn PDF document text
    • http://surtek.biz/image/files/20150105_164558.pdfIn PDF document text
    • https://inlandautorepairmurrietaca.com/wp-content/plugins/super-forms/uploads/php/files/9ee93bf272ac5ff3471941d3aabb50a3/83202290743.pdfIn PDF document text
    • http://slsnn.ru/content/file/63098265600.pdfIn PDF document text
    • http://villa-carlshorst.de/sites/default/files/file/fufawobalaborarik.pdfIn PDF document text
    • http://le-lemniscus-incandescent.fr/ckeditor/upload/files/vevubajokejorozi.pdfIn PDF document text
    • http://6nergy.fr/6nergy/sites/default/user/file/19641792568.pdfIn PDF document text
    • https://www.retake.dk/ckfinder/userfiles/files/mabapijotujovonijinisazu.pdfIn PDF document text
    • http://antwerp-rentals.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b521b9a99c0---56402230097.pdfIn PDF document text
    • http://mistral-paints.cz/userfiles/files/kakefufovixokin.pdfIn PDF document text
    • http://uelzecht.lu/userfiles/files/zovepar.pdfIn PDF document text
    • http://drukarnia-skawina.pl/app/webroot/media/files/94400045704.pdfIn PDF document text
    • http://vendsol.com/userfiles/file/damivamanutul.pdfIn PDF document text
    • http://babyindex.nl/images/uploads/61930544093.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/A3Ryygt5BCM/uplcv?utm_term=atharva+veda+mantras+pdfPDF link annotation
    • 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_off00014e5f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x14E5F 10552 bytes
SHA-256: f9976c7f4e6cb16caa0389e9f1050a7143bb32d977c3a38f2031a962c85d28d6
font_01_sfnt_off0001664b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1664B 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1