Malicious PDF — malware analysis report

Static analysis result for SHA-256 e0315abaa0a851ca…

MALICIOUS

PDF

86.6 KB Created: 2021-08-03 08:43:59 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-11-24
MD5: b9ccd4a2d2c66c10eea6ee76d7d7b847 SHA-1: 9e865be5c5dfd15c53e889483bc07c4a19f0b307 SHA-256: e0315abaa0a851ca519d86471bb99b316e8fa40f7fe3ba1266ddd8975e4710b5
156 Risk Score

Malware Insights

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

This PDF file was flagged by ML classifiers and ClamAV as malicious, specifically as a phishing trojan. Heuristics indicate it functions as a link farm, directing users to multiple external websites, some hosted on compromised CMS uploads. The presence of numerous unknown URLs suggests a distribution or phishing campaign.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9974

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://canadanur.com/resimler/files/5324635363.pdf In PDF document text
    • https://purefeeling8.com/data/file/37496979965.pdfIn PDF document text
    • http://www.gunyagder.org.tr/wp-content/plugins/super-forms/uploads/php/files/0vfo5i1omubc5g064edjr1psd2/81520587068.pdfIn PDF document text
    • http://premiumresourcing.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606c74f11f9ae---motasuwipuzurobasunon.pdfIn PDF document text
    • https://estigotours.com/wp-content/plugins/super-forms/uploads/php/files/2a1286cc9ce647764990ef7c2c54e3e2/jixifujagodakolesonod.pdfIn PDF document text
    • http://www.peopleoftheheath.com/wp-content/plugins/formcraft/file-upload/server/content/files/160f2d1f862633---7243760630.pdfIn PDF document text
    • http://icltindia.in/userfiles/file/86550186193.pdfIn PDF document text
    • http://workcoop.org/fckeditor/userimages/file/20210709191153.pdfIn PDF document text
    • https://macleanpinesdrivingschool.com.au/wp-content/plugins/super-forms/uploads/php/files/da0308ccd88081a04714b93ce89f25b9/zabigamedotutuvox.pdfIn PDF document text
    • https://intelean.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609128938fe64---xojubaxuxaz.pdfIn PDF document text
    • http://english-island.pl/wp-content/plugins/super-forms/uploads/php/files/77dkbd543t6m8j9t7lltbbkm34/85425942765.pdfIn PDF document text
    • http://thedewakohchang.com/image/upload/File/2649601045.pdfIn PDF document text
    • https://myhoorayhealth.com/wp-content/plugins/super-forms/uploads/php/files/pp6p8p1n31qiuhquo55ouoeri6/febote.pdfIn PDF document text
    • http://grossfamilyreunion.com/clients/0/00/00c8ca1d7e0432e0ca4c178cf0a97985/File/53603709842.pdfIn PDF document text
    • http://bscartridge.com/pic/40480139097.pdfIn PDF document text
    • http://vyveva.eu/UserFiles/File/29070388626.pdfIn PDF document text
    • https://rijst.nu/userfiles/file/9984742182.pdfIn PDF document text
    • http://sh8ke.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609aa692365b7---36002988562.pdfIn PDF document text
    • http://skidubravy.sk/spravca/ckfinder/userfiles/files/67723627166.pdfIn PDF document text
    • https://www.acptechnologies.com/wp-content/plugins/formcraft/file-upload/server/content/files/16091d6e9f38af---27529102175.pdfIn PDF document text
    • http://mertlakustika.cz/images/pages/file/sekizekimedopisogakuboma.pdfIn PDF document text
    • https://cananalimdar.com/wp-content/plugins/super-forms/uploads/php/files/h4gp2i6et3qs12boou4n844f79/fafarugepomumena.pdfIn PDF document text
    • http://fdscience.com/UPFILE/userfiles/files/38990962274.pdfIn PDF document text
    • https://klingende-zeder.de/wp-content/plugins/formcraft/file-upload/server/content/files/160be3877cd20b---buluwesejemadekod.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/DOqCt-cVA4I/uplcv?utm_term=dead+cells+android+apk+2020PDF 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_off0000f1ff.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF1FF 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off00010a11.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10A11 16712 bytes
SHA-256: 92dbd5f251ed507d4ed2c8c52b01cb420df3b3bccb4ee6e66278f780c7b96a4e
font_02_sfnt_off00013564.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13564 10744 bytes
SHA-256: 7a72c5920fca7c91caba474c2c40fef3e2a5cf38a941d3bf9dd9ddd8bb604eae