Malicious PDF — malware analysis report

Static analysis result for SHA-256 6a03b40a119eeb08…

MALICIOUS

PDF

82.4 KB Created: 2021-08-25 22:01:28 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-31
MD5: 6b2fe36dd212c455bb5f9b48ba941d25 SHA-1: f0560b9ddba12af879605f1eea0c49194a7770ea SHA-256: 6a03b40a119eeb08d4472d513fc36def1df3cb8ff30ecfd2c5453b148b5c3944
196 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains numerous links, many pointing to compromised WordPress upload storage and disposable hosting, indicative of a link farm used for phishing or malware distribution. The 'SE_PAYMENT_REDIRECT_LURE' heuristic strongly suggests the document's content is designed to trick users into believing there are changes to payment instructions, a common tactic in business email compromise attacks. While no scripts were explicitly extracted, the presence of embedded URLs and the overall structure point towards an attempt to redirect users to malicious sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9960

Heuristics 7

  • 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.
  • 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://gld-lining.com/user_img/files/wewubadatibitid.pdf In PDF document text
    • http://www.melodypods.com/wp-content/plugins/formcraft/file-upload/server/content/files/160e4f084aeec5---timilagaduwavuxuzojix.pdfIn PDF document text
    • http://ceramicaartisticamarsalese.it/userfiles/files/kaluden.pdfIn PDF document text
    • https://www.ogblfrontaliers.fr/wp-content/plugins/super-forms/uploads/php/files/cs7segr3mi9vpntogah4e7a8d2/simetitedugajaj.pdfIn PDF document text
    • http://al-bandak.com/userfiles/file/10709203746.pdfIn PDF document text
    • http://camwater.org/media/files/litam.pdfIn PDF document text
    • https://floraplant.gr/FCKeditor/userimages/file/mesulelovowegov.pdfIn PDF document text
    • https://loan-financial.com/wp-content/plugins/super-forms/uploads/php/files/78e597a275b2e2a563d3e6d401db298d/15192323189.pdfIn PDF document text
    • http://ecotrans.vn/upload/userfiles/files/wubiradezipiwulavupuz.pdfIn PDF document text
    • https://dukra.sk/editor_uploads/files/dixazepili.pdfIn PDF document text
    • https://paklya.su/design/img/upload/file/28423474841.pdfIn PDF document text
    • https://www.numberoneporthill.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/16092e6138878a---wuzovigixisenatimapu.pdfIn PDF document text
    • https://www.avenueroadadvertising.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608a949fe9fbb---zoreliwodujegafurofi.pdfIn PDF document text
    • https://plumcourse.com/wp-content/plugins/super-forms/uploads/php/files/c17d7f29695ca61c920357d450bf7f01/15314572197.pdfIn PDF document text
    • https://www.higher-energy-trampolineclub.com/wp-content/plugins/formcraft/file-upload/server/content/files/160afa2df2ad80---26580357625.pdfIn PDF document text
    • https://www.northwoodmedical.ca/wp-content/plugins/super-forms/uploads/php/files/7vnnnu2tn838i3348c2da2m6u9/meruripiforosijebogidugix.pdfIn PDF document text
    • http://studiolegaletrotta.eu/userfiles/files/totazetuzikipegeju.pdfIn PDF document text
    • http://dzbnf.com/upload/file///regejazubeniki.pdfIn PDF document text
    • https://brokenspoke.com/wp-content/plugins/super-forms/uploads/php/files/42e9d43c5a3f62daeb4da61d2723a468/fumaxak.pdfIn PDF document text
    • https://dtcprojects.com.au/wp-content/plugins/super-forms/uploads/php/files/ulfqahc3d1t6419t9ljpehekpb/fasuxuzokevirelujonozif.pdfIn PDF document text
    • http://stroi-sistema.ru/img/18226151034.pdfIn PDF document text
    • http://tangiahoang.com/skinkorea/Images_upload/files/99804880932.pdfIn PDF document text
    • https://nepalipublisher.com/ckfinder/userfiles/files/tizonumuburogojabem.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/FevRqgeaUVY/uplcv?utm_term=i+manifested+the+lotteryPDF 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_off0000dd0d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDD0D 17488 bytes
SHA-256: f5148da8d779e193eb18138358d7365cd3aea22d54cda6ca08a245ab5b5d9951
font_01_sfnt_off00010a7e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10A7E 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off00012295.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12295 10684 bytes
SHA-256: 94bff24a45044444ed7b7f9d9a31780c27958eab81995995bb768b5d0f4f49f2

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