Malicious PDF — malware analysis report

Static analysis result for SHA-256 74d235e7fd36d1f1…

MALICIOUS

PDF

85.9 KB Created: 2021-09-08 17:10:22 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-24
MD5: 9c5ab13162f69d8b7cc420c22a4b5ea9 SHA-1: 94c1064ffb632fb1de8059d33297ede8071f82af SHA-256: 74d235e7fd36d1f1148f360c18ba0a3dd6abbbebf08743e92d2f093b413c66b1
204 Risk Score

Malware Insights

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

The PDF contains multiple heuristics indicating it is a link farm designed to redirect users to malicious content, specifically a lure for payment redirection or bank detail changes. The presence of a download button lure and embedded URLs further supports a phishing or malware distribution attempt. Although no scripts were explicitly extracted, the overall structure and heuristic firings strongly suggest a malicious intent to trick users into downloading further payloads or revealing sensitive information.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9952

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 http://flomojapan.com/upload/files/31620369525.pdf In PDF document text
    • http://fohow77.ru/upload/file/setezorawawurox.pdfIn PDF document text
    • http://27derajat.com/assets/ckfinder/core/connector/php/uploads/files/74316089545.pdfIn PDF document text
    • https://apoiotelecom.com/imagens/img_fckeditor/file/lixapu.pdfIn PDF document text
    • https://elitteaccesorios.com/wp-content/plugins/super-forms/uploads/php/files/ucmt9hc1phbl88asmeo4cgpgt2/96728892441.pdfIn PDF document text
    • http://www.gradur.ba/wp-content/plugins/formcraft/file-upload/server/content/files/1613120536c3c4---ninexirajamonitivozubevel.pdfIn PDF document text
    • http://zimmerei-possert.at/bogifunemiji.pdfIn PDF document text
    • https://fratellifurloni.it/file/lotewe.pdfIn PDF document text
    • http://fanti-fitness.pl/uploads/assets/file/5449480401.pdfIn PDF document text
    • https://pjkconstruction.ca/images/file/devoj.pdfIn PDF document text
    • http://gazomotor.com/allinone/file/34739108168.pdfIn PDF document text
    • http://bobmeetin.com/media/galleries/files/13711908432.pdfIn PDF document text
    • http://www.kreasoft.mx/wp-content/plugins/formcraft/file-upload/server/content/files/1612ebaf2e396e---konuxidadefusafunozon.pdfIn PDF document text
    • http://inteko-tula.ru/f/file/nurivivemetexalemizunuj.pdfIn PDF document text
    • https://atpl.aero/ckfinder/userfiles/files/ziduboforimaposomo.pdfIn PDF document text
    • https://lensprovn.com/ckfinder/userfiles/files/tanadezasefuvim.pdfIn PDF document text
    • http://good163.cn/Uploadfiles/files/duvisinov.pdfIn PDF document text
    • http://metall-press.ru/files/63184285857.pdfIn PDF document text
    • http://www.sas.edu.mn/ckfinder/userfiles/files/13323166041.pdfIn PDF document text
    • http://megalaserasia.com/upload///73680446867.pdfIn PDF document text
    • http://kprmk.pl/userfiles/file/butijevedataxa.pdfIn PDF document text
    • https://stpeterscbs.ca/ckfinder/userfiles/files/gaguwovuve.pdfIn PDF document text
    • http://www.kissdocs.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/16134cb636816d---85401224089.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/Om9ozkHLxGw/uplcv?utm_term=unprotect+pdf+document+onlinePDF 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_off0000e95d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE95D 18640 bytes
SHA-256: ebdc89754c5ba0e903fc57d4d51b33b9c11691687fbe9c57b0616b0b5f0e3458
font_01_sfnt_off00011a89.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11A89 10560 bytes
SHA-256: dfb705927bdec9ed57c2d8d57eb32026c9bddb3906a36022e76e6e3a1cb93a63
font_02_sfnt_off00013284.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13284 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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