Malicious PDF — malware analysis report

Static analysis result for SHA-256 2e120aba7bcf138a…

MALICIOUS

PDF

84.2 KB Created: 2021-09-18 18:45:21 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-11
MD5: 0afd340f44f3cb366d7b983062a88a64 SHA-1: b4aba9ef70764fd46d837c0a387279a84597a63c SHA-256: 2e120aba7bcf138a63db02e500b34f274a88fe9e2d61762e0cc4392f0b991147
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The file was detected by ClamAV as Pdf.Phishing.Trojan and flagged by an ML classifier, indicating malicious intent. It contains numerous links to external PDF files hosted on various domains, many of which are identified as a link farm on disposable hosting or pointing to compromised CMS uploads. While no scripts were explicitly extracted, the PDF structure and heuristic firings suggest it is designed to redirect users to potentially malicious content, likely as part of a phishing or malware distribution campaign.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9974

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://gattoneva.pl/pages/userfiles/file/fifobutonup.pdf In PDF document text
    • http://snieznik.pl/userfiles/file/jenenepelivipubugate.pdfIn PDF document text
    • https://alohasafaris.com/files/guniwubevixosujutokumo.pdfIn PDF document text
    • http://nhakhoasaigonkimcuong.com/uploads/images/files/93929407846.pdfIn PDF document text
    • http://gsoam.ge/wp-content/plugins/formcraft/file-upload/server/content/files/161439fde63b14---moxesawafipipitamiso.pdfIn PDF document text
    • http://autoscuolapezzano.it/userfiles/files/41959326735.pdfIn PDF document text
    • http://flashdisplay.net/UploadFiles/FCKeditor/20210902195929.pdfIn PDF document text
    • https://refundsrefunds.com/wp-content/plugins/formcraft/file-upload/server/content/files/16140c4dca866b---21288922790.pdfIn PDF document text
    • https://mccartha-cobb.com/userfiles/files/xewidapopawoxugomozas.pdfIn PDF document text
    • https://jungleflightchiangmai.com/Uploads/files/tufigumisilijesi.pdfIn PDF document text
    • https://pianotuningdarwin.com/userfiles/files/92294653077.pdfIn PDF document text
    • https://nazrabilisim.com/calisma2/files/uploads/48416476926.pdfIn PDF document text
    • https://bf-pomosch.ru/wp-content/plugins/super-forms/uploads/php/files/ccvekkn16h9kli3ajuu5078ui1/nidotinokasodoxovobas.pdfIn PDF document text
    • http://maginsaatmetal.com/resimlerfiles/25265493862.pdfIn PDF document text
    • http://www.gunyagder.org.tr/wp-content/plugins/super-forms/uploads/php/files/7vq8t0meaa89u4edvfc5dbfo32/tepatavosepopamuzibam.pdfIn PDF document text
    • https://hrmconsulting.biz/upload/files/21588173956.pdfIn PDF document text
    • http://brcassociati.com/userfiles/files/rirukojirekazeke.pdfIn PDF document text
    • https://christembassyromford.org/wp-content/plugins/super-forms/uploads/php/files/9cd10b2da1f4c5387bf79b94635a2783/xevujajomizirodikovajas.pdfIn PDF document text
    • https://masterpieces-mallorca.com/wp-content/plugins/super-forms/uploads/php/files/e62ee77d4e25e74b8ff4b4e2fc786e37/zalupevopax.pdfIn PDF document text
    • http://lukasikgroup.pl/Image/files/47667655510.pdfIn PDF document text
    • https://phase1acoustics.com/wp-content/plugins/formcraft/file-upload/server/content/files/16145694b1d643---52837005972.pdfIn PDF document text
    • http://austria-ex.com/images/blog/file/feraxaji.pdfIn PDF document text
    • https://robindayne.com/ckfinder/userfiles/files/34413072981.pdfIn PDF document text
    • http://networkinglikepro.com/ckfinder/userfiles/files/jadudineroneb.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/1xuhb7AK25c/uplcv?utm_term=cartoon+downloads+for+androidPDF 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_off0000e3d5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE3D5 10332 bytes
SHA-256: dafb52f9fd8281cc77cd3d407e6c519e08464c63ee9add5b2bc84b633c155c59
font_01_sfnt_off0000fb4f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFB4F 18380 bytes
SHA-256: 6910a8afabff719e1e9aebcdd443f9961a68fe3018a1d235a3dff3886384a9cd
font_02_sfnt_off00012b02.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12B02 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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