Malicious PDF — malware analysis report

Static analysis result for SHA-256 e077a5daa6f93c56…

MALICIOUS

PDF

70.7 KB Created: 2021-09-04 06:48:54 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-07
MD5: a7c5a5729003b7b725b96ca23cfdafc7 SHA-1: c6cbb016daece8c82da61b39b8b089686f8584e5 SHA-256: e077a5daa6f93c5651cfa22ab225f25ae4417c799e5fe730c6b708722ce49093
156 Risk Score

Malware Insights

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

This PDF file was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. The heuristics reveal it functions as a link farm, with numerous URLs pointing to potentially compromised websites or disposable hosting. The primary purpose appears to be directing users to external resources, which is a common tactic for phishing or distributing further malware.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9975

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://laborke.ru/uplcv?utm_term=pmmvy+application+form+pdf+in+marathi PDF link annotation
    • http://hocikto.info/userfiles/file/lekejewovavigodepetaka.pdfIn PDF document text
    • http://w-f-l.de/user_img/file/81046286333.pdfIn PDF document text
    • https://pointvirgule.ca/upload/editor/file/87177422814.pdfIn PDF document text
    • http://www.jamesbgriffinlaw.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c599d136c84---gikivezo.pdfIn PDF document text
    • http://digitalpolicycouncil.com/imagenes/file/fofitajovolojebixi.pdfIn PDF document text
    • http://tuvanluatdanang.com/upload/ck/files/92459314529.pdfIn PDF document text
    • https://harpethvalleypto.org/wp-content/plugins/super-forms/uploads/php/files/e94d236067e052374dfec517109c7f2e/68314417577.pdfIn PDF document text
    • https://wholisticvibrations.com/wp-content/plugins/super-forms/uploads/php/files/d56d3824dcafa385c9a8fa100a19bb7a/9231950764.pdfIn PDF document text
    • http://bkbflooringusa.com/userfile/abbey/file/zobuxu.pdfIn PDF document text
    • http://duythuc-bearing.vn/uploads/userfiles/file/tisomipowelobipakon.pdfIn PDF document text
    • http://www.primalegal.eu/wp-content/plugins/super-forms/uploads/php/files/32ktn3m3i6ks09sl0qe1bpc3i7/dugajotibutademi.pdfIn PDF document text
    • https://edgecs.com/documents/xijunevixipuwopuvegiza.pdfIn PDF document text
    • https://rumusjitu.com/contents//files/zogasagisaxotakuke.pdfIn PDF document text
    • http://kientrucphatloc.com/upload/files/mekakabofesobojo.pdfIn PDF document text
    • http://sacmacbook.net/userfiles/file/daxafebizijo.pdfIn PDF document text
    • https://www.greenlakecruises.com/ckfinder/userfiles/files/60497442554.pdfIn PDF document text
    • https://www.phoenixdentalacademy.co.uk/wp-content/plugins/super-forms/uploads/php/files/8cc50e9263c4bac7376e15bbc1a9104f/fedejegunidu.pdfIn PDF document text
    • http://israel-aliya.com/wp-content/plugins/super-forms/uploads/php/files/5adfe421fc0a83931e1bf5ff927caf91/mutozokenadasazimototufu.pdfIn PDF document text
    • https://afanasyev-design.ru/wp-content/plugins/super-forms/uploads/php/files/87f6d95877a4b25ded2941d4a592072b/lupokuvigenowediwedegip.pdfIn PDF document text
    • http://curry-box-deluxe.de/userfiles/file/womug.pdfIn PDF document text
    • http://botanicgardenscafe.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/1607bce67d6ba3---77517296755.pdfIn PDF document text
    • http://casaalu.com/luutru/files/nesaruxobebajujidosurazu.pdfIn PDF document text
    • http://ohmamakitchen.com/uploads/files/86381118010.pdfIn PDF document text
    • https://asiaviews.org/wp-content/plugins/super-forms/uploads/php/files/mt09dgl0fe3v2lhjakdvp2htg3/kenozejidupijezob.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_off0000b4ed.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB4ED 15252 bytes
SHA-256: 107dfd0b53f61494df4f12d3dd17a7d321d5f614fde79fc65109fcc7b4aa2bca
font_01_sfnt_off0000dbf7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDBF7 10768 bytes
SHA-256: 4d1609138969ef8d7e4e820b752f8ed65619b9ac70f803798c46bc856fdb3830
font_02_sfnt_off0000f486.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF486 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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