Malicious PDF — malware analysis report

Static analysis result for SHA-256 11e1d395342810c8…

MALICIOUS

PDF

84.4 KB Created: 2021-09-02 21:03:33 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-07
MD5: ee8b30be31a47fc0214210304644bd9b SHA-1: 59c62035c7c7d112c68bd6055b2faed14e9a9091 SHA-256: 11e1d395342810c80a0d0433c24e93360ecc199091554aa192d2e99f9f6abd6d
196 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file was flagged by multiple heuristics as malicious, including a specific ML classifier and ClamAV detection. The 'SE_PAYMENT_REDIRECT_LURE' heuristic indicates the document's content is designed to trick users into believing there are new payment instructions, a common tactic in Business Email Compromise (BEC) attacks. The presence of numerous external URIs, many hosted on potentially compromised or disposable domains, further supports this malicious intent, likely serving as part of a phishing or credential harvesting operation.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9912

Heuristics 7

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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.
  • 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://pwmtqatar.net/userfiles/file/66163428571.pdf In PDF document text
    • http://pmrs.ps/userfiles/file/99950355718.pdfIn PDF document text
    • https://metroguards.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/1609a9505e9281---6906370903.pdfIn PDF document text
    • https://lightspec.com/wp-content/plugins/super-forms/uploads/php/files/145fb5cc0b4e3e14b1e5c4176dac8fe2/zumotirupenevoxu.pdfIn PDF document text
    • http://codienlanhminhquang.com/upload/files/46674132385.pdfIn PDF document text
    • https://artenika.pl/fck/file/98584494693.pdfIn PDF document text
    • https://www.isnb.co.uk/wp-content/plugins/super-forms/uploads/php/files/1aa07f6356cff8af9624ac4c16f39783/xuzowusorena.pdfIn PDF document text
    • http://benetalent.com/upload/files/tinowutorifudazikopojinu.pdfIn PDF document text
    • http://www.akutrans.com/wp-content/plugins/formcraft/file-upload/server/content/files/160e64d721c79f---71929148174.pdfIn PDF document text
    • https://tecsal.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/1612ffb968d831---tulebipaxisusovemun.pdfIn PDF document text
    • http://www.mtpartnersfl.com/wp-content/plugins/formcraft/file-upload/server/content/files/16080e92c82772---bunezelibiro.pdfIn PDF document text
    • http://www.agrosystem.com.tr/wp-content/plugins/formcraft/file-upload/server/content/files/160ada3a8dd0de---31453761602.pdfIn PDF document text
    • http://www.saraviation.com/wp-content/plugins/formcraft/file-upload/server/content/files/1611edfefb705e---65990964005.pdfIn PDF document text
    • https://lokmangal.co.in/wp-content/plugins/super-forms/uploads/php/files/a569907aa2d9b667071d5c069cafda37/65524574250.pdfIn PDF document text
    • https://digireg.se/upload/bajumudasapazaxiruwakok.pdfIn PDF document text
    • http://www.tsssport.com/wp-content/plugins/formcraft/file-upload/server/content/files/160885e0edf8aa---zefedaxajanipupuluf.pdfIn PDF document text
    • https://audreyheselmans.com/_files/file/51350128986.pdfIn PDF document text
    • http://www.lbf-cosmetics.com/website/wp-content/plugins/formcraft/file-upload/server/content/files/1607ad09f9629c---segor.pdfIn PDF document text
    • http://daydreamspin.com/userfiles/file/tipefa.pdfIn PDF document text
    • https://lesartsdansmonjardin.com/userfiles/file/20210803083439.pdfIn PDF document text
    • http://s8radziejowice-paszkow.pl/userfiles/file/85640925755.pdfIn PDF document text
    • https://mebelihome.ru/upload_picture/venufariwexirozelowodujog.pdfIn PDF document text
    • https://kurtoglumob.com/upload/file/16271717921.pdfIn PDF document text
    • http://www.restorationservice.ca/wp-content/plugins/formcraft/file-upload/server/content/files/1610069b685c18---69195239380.pdfIn PDF document text
    • https://estidevelopers.com/wp-content/plugins/super-forms/uploads/php/files/fe6a111b52a48c0ff0c37304fa51b609/ludanojolutikulugemoz.pdfIn PDF document text
    • https://rajatotogroup4.com/contents//files/nidisuvixizuwenes.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/6naE_Nh8_CY/uplcv?utm_term=write+on+pdf+app+freePDF 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_off0000e7d1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE7D1 17684 bytes
SHA-256: ec3eb7f637d6f6ca75510c5bde24a790a92b4d536e12a2d6eb2fe8a2f7776732
font_01_sfnt_off00011487.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11487 10268 bytes
SHA-256: b838015e53585d9b931cccf274b7c9641b89182d00edd9e851fdcb9e42832919
font_02_sfnt_off00012bbe.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12BBE 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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