Malicious PDF — malware analysis report

Static analysis result for SHA-256 0fd7172c56f7a3f7…

MALICIOUS

PDF

84.7 KB Created: 2021-08-10 02:47:40 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-24
MD5: 6f3c3396a79621b939a45a2e76f6ae09 SHA-1: 66a129f251f7391e18aabc487b5741447e316654 SHA-256: 0fd7172c56f7a3f7f2584451c5b4bb72c4a5aeabf5a8d328bb0c51b1e5443e0a
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

This PDF file was flagged by a machine learning classifier and ClamAV as malicious, specifically as a phishing trojan. It contains numerous embedded URLs, many pointing to compromised WordPress sites or disposable hosting, suggesting a link farm designed to redirect users to malicious content. The presence of these links and the high ML score indicate a strong likelihood of phishing or malware distribution.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9982

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 https://huntic.ru/uplcv?utm_term=algebra+2+book+common+core+pdf PDF link annotation
    • https://creationstationdance.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b8e6b7196bf---rininalofepibokutuf.pdfIn PDF document text
    • http://rafaelokazakov.com/file/xirigadaz.pdfIn PDF document text
    • http://royalwedding.jp/images/blog//file/11441711535.pdfIn PDF document text
    • https://vinamex.info/uploads/news_file/52640647122.pdfIn PDF document text
    • https://www.loscam.com/lib_common/ckeditor/ckfinder/userfiles/files/zizokoki.pdfIn PDF document text
    • http://reclaimsplus.com/wp-content/plugins/super-forms/uploads/php/files/b57de34457e8c480b788ff40bbbad179/fafaxeze.pdfIn PDF document text
    • http://foire-fromages-et-vins.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609b1bc8465f4---sagamuwek.pdfIn PDF document text
    • http://www.1000ena.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607975b3399c2---lefipagiseruravunamolugi.pdfIn PDF document text
    • http://growlink.biz/userfiles/file/lofojukagafil.pdfIn PDF document text
    • https://www.coconutlodge.com/wp-content/plugins/formcraft/file-upload/server/content/files/160e0b32e87380---dedejivutugipabutimizimot.pdfIn PDF document text
    • http://avtrak.ru/ckfinder/userfiles/files/babowuwe.pdfIn PDF document text
    • https://greffedecheveux.center/upload/ckfinder/files/fevabadamaxeboteg.pdfIn PDF document text
    • http://castel.lu/userfiles/files/45805890234.pdfIn PDF document text
    • https://cullinanconstruction.com/wp-content/plugins/super-forms/uploads/php/files/v3ao6ttqc7a89dkdt40isbr75u/zujufojusifofijefedoxum.pdfIn PDF document text
    • http://beachhigh65.com/clients/879402/File/57199204061.pdfIn PDF document text
    • https://muratay.nl/userfiles/file/48836834237.pdfIn PDF document text
    • https://www.ediliziaindustriale.com/wp-content/plugins/formcraft/file-upload/server/content/files/16085753662916---2487822037.pdfIn PDF document text
    • https://mygamedaysports.com/wp-content/plugins/super-forms/uploads/php/files/5c44530668aeb14bbdc25adef00bb07b/60214748636.pdfIn PDF document text
    • https://dentinale.eu/wp-content/plugins/super-forms/uploads/php/files/2ebd84fcaef2b9259ea8fb9acea2eec6/73493684939.pdfIn PDF document text
    • http://julieesteban.com/wp-content/plugins/formcraft/file-upload/server/content/files/16072486b277d7---vefasejunawonotini.pdfIn PDF document text
    • https://action-roofing.com/wp-content/plugins/super-forms/uploads/php/files/b558500117cbd7f03f730e68871109cb/migawopo.pdfIn PDF document text
    • https://www.projectorrentals.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606f6c0e9e7f5---lupup.pdfIn PDF document text
    • https://www.pharmawell.eu/ckfinder/userfiles/files/32593200080.pdfIn PDF document text
    • https://www.sahabatkeluargahomecare.com/wp-content/plugins/formcraft/file-upload/server/content/files/160ac4aea27304---90341533562.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_off0000e27e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE27E 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000fa90.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFA90 18632 bytes
SHA-256: de21bea0c7b8f9677f3188458dd76e41a931973f13e72d55281d1888e86e2380
font_02_sfnt_off00012b97.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12B97 10940 bytes
SHA-256: 89a644759ec99b64643460e81e4ebb5cf21e0d34b96592439ddcf1f85e83c8b0

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