Malicious PDF — malware analysis report

Static analysis result for SHA-256 832de45d322648f3…

MALICIOUS

PDF

85.5 KB Created: 2021-09-06 01:34:27 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-27
MD5: cc41fa43d2c5022d52a7c19805d70087 SHA-1: 25fde23cf549a7f33f0275211bdfd4dbca61d91b SHA-256: 832de45d322648f3d752ec69411d1054d3c700d4c1891fea330052548d39642f
204 Risk Score

Malware Insights

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

This PDF file was detected as malicious by ML classifiers and ClamAV, indicating a phishing and potential trojan threat. The heuristics reveal it functions as a link farm, directing users to compromised WordPress upload directories and other unknown hosts, likely to download a second-stage payload. The presence of a 'download button' lure and a 'payment redirection' lure strongly suggests a business email compromise or financial fraud attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9977

Heuristics 8

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • Payment redirection / bank-detail change lure high SE_PAYMENT_REDIRECT_LURE
    Document describes new or changed bank, wire, ACH, IBAN, SWIFT, or routing instructions — a high-value business-email-compromise pattern
  • 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.
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • 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://laxmigrouppune.com/wp-content/plugins/super-forms/uploads/php/files/a64e301af1433b504f109a9d8d34384d/22550393603.pdf In PDF document text
    • http://ophirtonhotel.co.za/wp-content/plugins/formcraft/file-upload/server/content/files/16075bea75f82d---52640841367.pdfIn PDF document text
    • http://trustarshida.co/cache/fck_files/file/19987249610.pdfIn PDF document text
    • https://cakkue.com/contents/files/13902946859.pdfIn PDF document text
    • http://www.1000ena.com/wp-content/plugins/formcraft/file-upload/server/content/files/160dc935e72446---59691714856.pdfIn PDF document text
    • http://aotwresort.info/ckfinder/userfiles/files/totok.pdfIn PDF document text
    • http://www.iamgoingto1996.com/wp-content/plugins/formcraft/file-upload/server/content/files/160f1e4a450a27---soparisojebe.pdfIn PDF document text
    • http://louisamerino.com/userfiles/file/tukomaraz.pdfIn PDF document text
    • http://clubselectionvoyages.com/images/file/73855595538.pdfIn PDF document text
    • http://thementalhealthadvocates.org/files/userfiles/file/xoduvirekujefis.pdfIn PDF document text
    • https://alphaveneers.co.uk/wp-content/plugins/super-forms/uploads/php/files/1b6802a675842e065522d22b18edd49b/bibuwunexifebadadonu.pdfIn PDF document text
    • http://m-camper.ru/ckfinder/userfiles/files/71026863970.pdfIn PDF document text
    • http://bagandpack.ru/wp-content/plugins/super-forms/uploads/php/files/be66e7057d39a19f249cb357bdab016a/97587743485.pdfIn PDF document text
    • https://www.parkgest.ch/wp-content/plugins/formcraft/file-upload/server/content/files/160afc401062ec---kulitomisifa.pdfIn PDF document text
    • http://ebd.su/UFD/7623/files/razeraroribawiwexadamopa.pdfIn PDF document text
    • http://bethtikvahevents.ca/clients/2/20/20a91c0cb94b02964b0d1c5d980f1596/File/nidezunizolav.pdfIn PDF document text
    • https://jxloanchien.com/style/postimage/file/pakekomazotow.pdfIn PDF document text
    • http://thepdaitruongphat.com/upload/ck/files/bazegidosonipeviva.pdfIn PDF document text
    • https://auf.vn/wp-content/plugins/super-forms/uploads/php/files/4pk24gre721suan9rldu8huvv4/ronexime.pdfIn PDF document text
    • http://trovas.com/userimages/66370442281.pdfIn PDF document text
    • https://mikepromedia.com/wp-content/plugins/super-forms/uploads/php/files/kb0joc25r1jvlqmkaeld8s0kd5/napunijagag.pdfIn PDF document text
    • https://action-roofing.com/wp-content/plugins/super-forms/uploads/php/files/6ec53d6f795ea74876c69ac1cc52ceb3/82870092838.pdfIn PDF document text
    • https://miamiuniquelimo.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608e0897bc049---libuturul.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/Om9ozkHLxGw/uplcv?utm_term=step+down+transformer+project+pdf+downloadPDF 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_off0000e73a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE73A 10980 bytes
SHA-256: 6b44bc83eb83958842f82000c1e4130ae5d86f2419aa5963242dec5d9aed9277
font_01_sfnt_off000100cf.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x100CF 18276 bytes
SHA-256: 9c9a9cf7e1cde8fdb084e717f2b1ccb560949e95d11d707a0217d835cadc8e70
font_02_sfnt_off00013047.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13047 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1