Malicious PDF — malware analysis report

Static analysis result for SHA-256 dae749e02283a961…

MALICIOUS

PDF

81.5 KB Created: 2021-08-31 00:19:12 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-16
MD5: ef2dcccfc1aebb974f1e41fd88763af8 SHA-1: 1dbf200b3b70e2ecf36703175363c1ff8faca96f SHA-256: dae749e02283a961d9b6016e9e509477052620662a8183251821ff4673f85ef7
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF file contains numerous embedded URLs, many of which point to compromised websites or disposable hosting, indicating a link farm or redirection scheme. The ML classifier and ClamAV detection strongly suggest malicious intent, likely related to phishing or malware distribution. No scripts were extracted, but the structure and URL patterns are consistent with a malicious PDF designed to lure users to external sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9974

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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://abwva.com/uploads/files/rorogosuwimobegeredon.pdf In PDF document text
    • https://dodomacnosti.net/data/file/mekinakokovebelefid.pdfIn PDF document text
    • http://jamoncup.es/wp-content/plugins/formcraft/file-upload/server/content/files/160ab632f00033---giforuriza.pdfIn PDF document text
    • https://www.alignerco.ca/wp-content/plugins/super-forms/uploads/php/files/d882cf2dc46ef935f2811ffa9348395b/32201349333.pdfIn PDF document text
    • https://faktxeber.ru/resimler/files/lirumijosibi.pdfIn PDF document text
    • https://almuhja.net/ckfinder/userfiles/files/jiwifoguvifobavuza.pdfIn PDF document text
    • http://szolnokepul.hu/userfiles/file/26508795592.pdfIn PDF document text
    • http://e-sheremet.com/img/68837013684.pdfIn PDF document text
    • http://istanbulballoons.com/ckfinder/userfiles/files/lusumegosavolepogobafali.pdfIn PDF document text
    • http://www.dj-csnl.nl/wp-content/plugins/formcraft/file-upload/server/content/files/1607a2181ce019---44443789480.pdfIn PDF document text
    • https://araprinter.com/ckfinder/userfiles/files/kejodigonikugabuwopumugi.pdfIn PDF document text
    • https://beaumont-residence.com/wp-content/plugins/super-forms/uploads/php/files/25uaq5c1tinmilqkg8d2r6qi8b/sudunevexologulekurokal.pdfIn PDF document text
    • http://wu-pao.com/upfiles/editor/files/35357443483.pdfIn PDF document text
    • http://eko-inwest.eu/upload/file/pokibasosukoxi.pdfIn PDF document text
    • http://playbabydoll.com/userfiles/file/wopuzemimenugiko.pdfIn PDF document text
    • https://net-mex.hu/ckfinder/userfiles/files/mepesadutemebepa.pdfIn PDF document text
    • http://yangs-ns.com/ckfinder/userfiles/files/20210831050614.pdfIn PDF document text
    • http://vistobrasil.net/uploads/file/jadaduwapobamezemitid.pdfIn PDF document text
    • http://themultifold.com/wp-content/plugins/super-forms/uploads/php/files/t8c3o1dha73i8r5jql0v55ud35/84133294452.pdfIn PDF document text
    • https://jfefood.com/wp-content/plugins/super-forms/uploads/php/files/cc3efffec4c530e833229220b567e526/70003058344.pdfIn PDF document text
    • http://stromzeleny.cz/file/51468950608.pdfIn PDF document text
    • http://www.holderit.com/wp-content/plugins/formcraft/file-upload/server/content/files/160ae3460dd2d6---diwamomizi.pdfIn PDF document text
    • https://www.clubmanizales.com.co/wp-content/plugins/formcraft/file-upload/server/content/files/16083689c4b88b---82466112652.pdfIn PDF document text
    • https://stopserv.ru/files/file/luwavonefinemivowomixezuw.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/ngfLrbzwjls/uplcv?utm_term=quotes+about+legends+and+heroesPDF 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_off0000daa0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDAA0 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000f2b7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF2B7 10736 bytes
SHA-256: 853b4a53db446caccfd18decbe3b5ec152f3ed167b3838e207ae92713701df18
font_02_sfnt_off00010b3a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10B3A 17004 bytes
SHA-256: 36fed9b4922073491c8afe8f87033f53d4d3f0f5982385ddd10b72921b964c89

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