Malicious PDF — malware analysis report

Static analysis result for SHA-256 a2a2ba2c1058aa93…

MALICIOUS

PDF

79.2 KB Created: 2021-09-11 05:36:58 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-26
MD5: 3d617273f2a21a68dbd0d9be92550999 SHA-1: 15c6390735b7f22e2491964dab4e8b5021e7c8c8 SHA-256: a2a2ba2c1058aa9329b6e6cdf2f10c87552c54bb23fdd5ef7f09821dbe5cf1fa
156 Risk Score

Malware Insights

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

This PDF file was flagged as malicious by ML classifiers and ClamAV, indicating a high likelihood of malicious intent. The heuristics reveal it functions as a link farm, directing users to multiple external websites, some of which are hosted on compromised CMS uploads or disposable domains. The embedded URLs suggest a phishing or malware distribution scheme, likely delivered as a spearphishing attachment.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9953

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://seanbittinger.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/xutaxajisapalunagididem.pdf In PDF document text
    • http://venusland.vn/app/webroot/img/files/javepebufisumemubulazupem.pdfIn PDF document text
    • https://buyafranchise.org/files/files/vudiwuwexumibuxosurem.pdfIn PDF document text
    • http://yasaitogo.com/uploads/files/73660360994.pdfIn PDF document text
    • http://jikaramen.com/uploads/files/wizupidipitugufenekojena.pdfIn PDF document text
    • http://fszhenjia.com/upfolder/e/files/20210905075825.pdfIn PDF document text
    • http://aksaxena.com/bpms/includes/fckeditor_uploads/userfiles/file/95231099982.pdfIn PDF document text
    • http://problemconsulting.com/img/download/files/46088671730.pdfIn PDF document text
    • http://pretaporter-pegah.com/userfiles/file/vepetajesapugowebupos.pdfIn PDF document text
    • http://www.novosib-sport.ru/ckfinder/userfiles/files/fuduzemadegagoliwe.pdfIn PDF document text
    • http://novosib-sport.ru/ckfinder/userfiles/files/konuzubameb.pdfIn PDF document text
    • https://www.verpoort-bouw.be/wp-content/plugins/formcraft/file-upload/server/content/files/1613ab1d4de82b---gofulazen.pdfIn PDF document text
    • http://www.1000ena.com/wp-content/plugins/formcraft/file-upload/server/content/files/161343d43ecabb---libiduferen.pdfIn PDF document text
    • https://ph2020.org/ckfinder/userfiles/files/61044601432.pdfIn PDF document text
    • http://azizolace.cz/images/file/kejadufe.pdfIn PDF document text
    • http://xn--hh0b97d8is16e.com/userData/board/file/71554555355.pdfIn PDF document text
    • http://zovsh.com/Uploadfiles/files/41321219807.pdfIn PDF document text
    • http://mannaz.pl/userfiles1/file/12976234914.pdfIn PDF document text
    • https://mbbs.hr/files/37029889957.pdfIn PDF document text
    • http://waycreon.net/bhaskar/yii/upload/files/xetulopi.pdfIn PDF document text
    • https://www.brunosistemi.com/wp-content/plugins/formcraft/file-upload/server/content/files/161354b8c664f9---jejeketugizixuvibo.pdfIn PDF document text
    • http://vhz.cz/user-files/fenadadidap.pdfIn PDF document text
    • http://zpb-maciejewski.pl/upload/fck/file/7660746405.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/Om9ozkHLxGw/uplcv?utm_term=how+to+backup+your+cell+phonePDF link annotation
    • http://s292376414.onlinehome.fr/datas/imgmail/file/88449841250.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_off0000d280.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD280 10736 bytes
SHA-256: eb8eed6387dd27fdec6952888e1f2b7e204dd1ef50b3a2289955394f214f0988
font_01_sfnt_off0000eaf6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEAF6 17032 bytes
SHA-256: 6d5505b3c7b420325002b145e213e3efc6d19c6b7c38660e9b30aa1ecce72e47
font_02_sfnt_off0001175c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1175C 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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