Malicious PDF — malware analysis report

Static analysis result for SHA-256 9e37a8f92ed5bef2…

MALICIOUS

PDF

96.8 KB Created: 2021-07-04 19:09:27 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-09-15
MD5: 929305f25ca857e75535a2dbfa768d39 SHA-1: e697e1cf49e8ac6ad5635f6937f525d535085016 SHA-256: 9e37a8f92ed5bef2fa5f65d71d613fb4b8fb98acd5fbab6c730ff0c2217fdd7e
156 Risk Score

Malware Insights

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

The PDF file was identified as malicious by ML classification and ClamAV, indicating a phishing or trojan threat. It contains numerous embedded URLs, many pointing to compromised CMS uploads or disposable hosting, suggesting a link farm designed to redirect users to malicious content. The document body was unreadable, but the heuristics strongly indicate a malicious intent to leverage these links for further compromise.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9936

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 https://garglob.ru/uplcv?utm_term=homo+ludens+a+study+of+the+play+element+in+culture+pdf PDF link annotation
    • http://albino-pitti.com/pub_img/file/31023273351.pdfIn PDF document text
    • https://warungmimpishio.com/contents//files/fuwabikudigamebopanotenon.pdfIn PDF document text
    • http://ajk-opakowania.eu/upload/fck/file/vezimijikewoda.pdfIn PDF document text
    • https://givemeit.ru/wp-content/plugins/super-forms/uploads/php/files/6bd3e71cd5d0bfec13779eb64fdd03be/79906993880.pdfIn PDF document text
    • http://lisahyatthealth.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608139164581d---77836583769.pdfIn PDF document text
    • https://broadstripe.com/wp-content/plugins/super-forms/uploads/php/files/e28105199f7d08102990bd24a3b3e411/zoxedupudiwokifotepozor.pdfIn PDF document text
    • http://samtekelektrik.com/files/77437851952.pdfIn PDF document text
    • http://www.yourhealthyourchoice.org/wp-content/plugins/formcraft/file-upload/server/content/files/160c92a01f0036---33324778578.pdfIn PDF document text
    • https://michaels-limo.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c29de6b5501---98723246253.pdfIn PDF document text
    • http://gyobel.itpublic/file/tofilevavoned.pdfIn PDF document text
    • http://cbgnfinance.com/userfiles/file/90708228759.pdfIn PDF document text
    • http://www.alex-vasilkov.ru/images/wisdom/file/12532726930.pdfIn PDF document text
    • https://flylights.pl/wp-content/plugins/super-forms/uploads/php/files/hgjiu5itibocmo9ljpnjpo7ln3/34366390078.pdfIn PDF document text
    • http://ajarnveerapong.com/UserFiles/file/11550523033.pdfIn PDF document text
    • https://velvetskin.pl/wp-content/plugins/super-forms/uploads/php/files/62cc1bd17750801680e3fee1828014b8/vuluwukudikab.pdfIn PDF document text
    • http://bidmitt.com/img/files/file/safesexaxukizaduborasel.pdfIn PDF document text
    • https://palcev.ru/userfiles/file/21363887573.pdfIn PDF document text
    • http://thepnguyentran.vn/media/ftp/file/woluxizopasapusoginuv.pdfIn PDF document text
    • http://www.iycadana.org/wp-content/plugins/super-forms/uploads/php/files/s6jc7ipikqkoaoedq0kpuf8lq4/63094210645.pdfIn PDF document text
    • https://www.kiteschule-eckernfoerde.de/wp-content/plugins/formcraft/file-upload/server/content/files/1608040f529715---lerubaxale.pdfIn PDF document text
    • https://pfgmm.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/160ceae3873598---gexelovodekafo.pdfIn PDF document text
    • https://bursaceviritercume.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607fe13f44366---vovivuvunisej.pdfIn PDF document text
    • https://journeywithmypet.com/ckfinder/userfiles/files/degejadigariv.pdfIn PDF document text
    • https://www.travelticket.com.au/wp-content/plugins/super-forms/uploads/php/files/dfgigb22ffiig7hhrs2t4dhfgq/ririfegekilojovemek.pdfIn PDF document text
    • 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_off00011678.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11678 11092 bytes
SHA-256: fcfa216119bd409f745b920dbe8ddb4360a806b3a5671dc0968d678ee03f23a4
font_01_sfnt_off0001301d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1301D 17620 bytes
SHA-256: 97f03dd282e18a6245de67c3caaf8bbe2894e6f049abc9d8d9abe67243c97658
font_02_sfnt_off00015d1b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x15D1B 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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