Malicious PDF — malware analysis report

Static analysis result for SHA-256 e283910cea05a0a2…

MALICIOUS

PDF

93.3 KB Created: 2021-08-06 16:34:05 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-11
MD5: 95587d8a57afbbe781461fc577ec2e15 SHA-1: 459d0d4b3f9d96ab24931b6b1c3a94fc48f2c8e0 SHA-256: e283910cea05a0a281e42832bcf295ebfd90812aa4004192cf39d9bda86ca580
196 Risk Score

Malware Insights

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

This PDF file was detected as malicious by ClamAV and an ML classifier, exhibiting characteristics of a payment redirection lure. It contains numerous links to compromised WordPress sites and disposable hosting, suggesting an attempt to redirect users to malicious content or phishing pages. The presence of embedded URLs and the nature of the heuristics strongly indicate a phishing or malware distribution campaign.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9994

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 https://pixomot.ru/uplcv?utm_term=freeway+rapper+height PDF link annotation
    • http://www.leesii.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607c3e4abde58---majofenipubijamorodirek.pdfIn PDF document text
    • https://primeodontorj.com/wp-content/plugins/super-forms/uploads/php/files/a75dfe2db34267fb864ac947f7752a56/18154880823.pdfIn PDF document text
    • http://www.iqubz.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608f7d619d104---xarukojiturogemerivo.pdfIn PDF document text
    • http://massvt.sk/editor_uploads/system/files/81223719214.pdfIn PDF document text
    • http://northphoenixmustangs66.com/clients/4/4b/4b49b54eec06ebba3741256e9f3e6f2b/File/67021346387.pdfIn PDF document text
    • http://www.northeastmarquees.com/wp-content/plugins/super-forms/uploads/php/files/ea086af33905a3e5d807da91d1dfc577/medoduxelezuvum.pdfIn PDF document text
    • http://tjsijiqing.com/ckfinder/userfiles/files/2021/0609/e1f8debd95fb4ee33baa7a4741c43fd7.pdfIn PDF document text
    • https://atcotourismtravel.com/userfiles/file/58228110971.pdfIn PDF document text
    • http://www.asslar.de/downloads/saxufebes.pdfIn PDF document text
    • https://g3az.com/wp-content/plugins/formcraft/file-upload/server/content/files/160ace9d67ea4c---mopikugapirabopek.pdfIn PDF document text
    • https://donnasalon.ru/wp-content/plugins/super-forms/uploads/php/files/c7cb0b1793a6a9d3301562577fa60b04/43209027549.pdfIn PDF document text
    • https://workinhotel.com/upload/fckfile/74552387681.pdfIn PDF document text
    • https://mavismanagement.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607d320d76f86---voruzekezoto.pdfIn PDF document text
    • https://avonsteel.com/UserFiles/file/wipujonokiredum.pdfIn PDF document text
    • https://sportcity.bg/webroot/img/content/files/getimopewomamowisonaxi.pdfIn PDF document text
    • http://pk.mo/userfiles/file/zezupogijibivubabolu.pdfIn PDF document text
    • http://magogaralbamoble.com/galeria/files/52717819453.pdfIn PDF document text
    • https://gservicepz.com/wp-content/plugins/super-forms/uploads/php/files/fb3c9075ef60c9f1b60b2482e49ff81f/lugejoduwugemovabagoribid.pdfIn PDF document text
    • https://www.bouwenaaneensterkwerkgeversmerk.nl/wp-content/plugins/formcraft/file-upload/server/content/files/160836d0915d3e---20712846114.pdfIn PDF document text
    • http://anma.pl/anma_edytor/file/fixerixuworinivinamuva.pdfIn PDF document text
    • https://beautifullifeuk.com/wp-content/plugins/super-forms/uploads/php/files/3b3543c3d9673d525caf45ded85d52de/72767200495.pdfIn PDF document text
    • http://saovietgroup.com/upload/FCK/file/99983942163.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_off0001094d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1094D 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0001215f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1215F 17812 bytes
SHA-256: bc2cee4b0002014e1728dd5e332bd02327b5835eb3d0d048d51a9e2ee916fa39
font_02_sfnt_off0001501d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1501D 10268 bytes
SHA-256: 85b19e421f9b6d1a3b1574b75b0413b3f8421bb7290b47aa31a295170a8f65c5

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