Malicious PDF — malware analysis report

Static analysis result for SHA-256 bfa67d2ceb6d5ca8…

MALICIOUS

PDF

78.1 KB Created: 2021-09-07 21:55:19 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-05
MD5: a397cbf2b27e2654396ba659b36a6ecb SHA-1: a4c602403ee1ba9da697445e10dceac85e48091f SHA-256: bfa67d2ceb6d5ca8727e9066f346cb21038cc945ec7545ad9ba8fecdf23296d9
156 Risk Score

Malware Insights

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

The PDF was flagged by ML classifiers and ClamAV as malicious, specifically as a phishing trojan. It contains a large number of links, many pointing to compromised CMS upload storage or disposable hosting, indicating it functions as a link farm. These links are likely intended to lead users to phishing sites or download further malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9953

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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 https://mangonebike.com/uploads/file/65769847271.pdf In PDF document text
    • http://pusancard.com/userData/board/file/xetox.pdfIn PDF document text
    • http://abwingsbuffalo.com/uploads/files/wisokelitepalamowamo.pdfIn PDF document text
    • http://ahcxdq.com/uploads/file/011025485882.pdfIn PDF document text
    • https://clifestyle.net/uploades/userfiles/file/fabedofasomaf.pdfIn PDF document text
    • https://sharidendesignasphalt.com/wp-content/plugins/super-forms/uploads/php/files/3986a800a6bad27aa9f39d4861d6bfe6/fetef.pdfIn PDF document text
    • https://bettenbaehren.de/wp-content/plugins/formcraft/file-upload/server/content/files/160e1b5830c2a3---84209070979.pdfIn PDF document text
    • http://www.radiopopiatej.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609834cd9a2b7---93857009415.pdfIn PDF document text
    • https://tkpmission.org/wp-content/plugins/formcraft/file-upload/server/content/files/160ca2b99446a9---jelesaloveboruru.pdfIn PDF document text
    • http://artecgroupservices.com/imagenes/file/39266232630.pdfIn PDF document text
    • http://francisfamilyreunion.net/clients/870293/File/47794934719.pdfIn PDF document text
    • http://traktorpulling.de/ablage/userfiles/files/26894283194.pdfIn PDF document text
    • http://ckpak.com/fckeditor/userfiles/file/12004818083.pdfIn PDF document text
    • http://nnk.gr/wp-content/plugins/formcraft/file-upload/server/content/files/1606c6d69c4208---4322147242.pdfIn PDF document text
    • https://hartwellcook.com/wp-content/plugins/super-forms/uploads/php/files/8b37eb46cf88df401a162f7a080209d5/30073519538.pdfIn PDF document text
    • https://chrmglobal.com/userfiles/file/29110357714.pdfIn PDF document text
    • http://asalsold.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a5e544ac849---87379990607.pdfIn PDF document text
    • http://supermarketdv.ru/files/file/53498166540.pdfIn PDF document text
    • https://elicopter-de-inchiriat.ro/wp-content/plugins/formcraft/file-upload/server/content/files/161236005198bf---49952604991.pdfIn PDF document text
    • https://primewestelectrical.com/wp-content/plugins/super-forms/uploads/php/files/29daeead26cdcda2d12ce294fe5c1779/wemebagijujedu.pdfIn PDF document text
    • http://mtcclassof81.com/clients/0/0a/0a45bd3013a8cc77df817aa526a911b1/File/1709255191.pdfIn PDF document text
    • http://www.nbrownies.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/1607247774314c---darofife.pdfIn PDF document text
    • https://twinslock.com/ckfinder/userfiles/files/16370047436.pdfIn PDF document text
    • http://getem.pl/files/file/82120666657.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/zMnd8XtcwSM/uplcv?utm_term=sindrom+lobus+frontalis+pdfPDF 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_off0000cd54.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCD54 17392 bytes
SHA-256: ff6d9d9b4900d330a39a81380f9cda0feee73467843d3c222e3a3b17cc689f5c
font_01_sfnt_off0000fa74.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFA74 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off0001128b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1128B 10840 bytes
SHA-256: c814a9161116834eb614c19fe9270435375e23f389758921dac4404ed61eb6c1

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