Malicious PDF — malware analysis report

Static analysis result for SHA-256 2d5b7040511812cf…

MALICIOUS

PDF

203.1 KB Created: 2021-07-18 22:43:57 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-27
MD5: 436568d110ad0a32d927851366ebf29c SHA-1: e6cb70413594562f1222c0f02880acc4585927b8 SHA-256: 2d5b7040511812cfe357cdcb5aced0f52c23c980b71c51fa9bc57c81395c7018
126 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The file was detected as malicious by ML classifiers and ClamAV, indicating a phishing attempt. It contains multiple links, one of which points to a compromised WordPress upload directory, likely intended to host malicious files. The embedded links are designed to trick users into downloading further malware.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9092

Heuristics 5

  • 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.
  • 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://suma.ca/upload/editor/file/53073552590.pdf In PDF document text
    • https://www.vibrationmonitoring.asia/wp-content/plugins/formcraft/file-upload/server/content/files/160b39732c0fae---seriloren.pdfIn PDF document text
    • http://anhuifan.com/upload_fck/file/2021-5-12/20210512090036360129.pdfIn PDF document text
    • http://aven.su/userfiles/file/radomabojipurugi.pdfIn PDF document text
    • https://www.kbstephens.com/wp-content/plugins/super-forms/uploads/php/files/0dd8f4133ec3f45e7cc51349a27f90ed/91492688842.pdfIn PDF document text
    • https://benchmarktransitions.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c40772a43d7---jobiwoxokemirokilowis.pdfIn PDF document text
    • https://www.onestopnaturalstore.ca/wp-content/plugins/super-forms/uploads/php/files/8o2tgjb3jlgp7rrj9tmd32l9lr/bofufupoze.pdfIn PDF document text
    • https://aprilboya.com/userfiles/file/50642996353.pdfIn PDF document text
    • http://aj-logistics.com/stock/userfiles/file/neruzetedelefobi.pdfIn PDF document text
    • http://profisystem.ro/wp-content/plugins/formcraft/file-upload/server/content/files/16089a656b0197---77670836991.pdfIn PDF document text
    • http://www.adanakursmerkezi.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b5a819583f3---babum.pdfIn PDF document text
    • http://tpdw.pl/userfiles/file/woniwikapusimogavex.pdfIn PDF document text
    • https://mission4recruitment.com/wp-content/plugins/formcraft/file-upload/server/content/files/160761e9f01123---67377657491.pdfIn PDF document text
    • https://landbondcorten.com/attachment/file/cd5708fbf8f99e36e529d6baf3134ada.pdfIn PDF document text
    • https://mumegram.com/userfiles/file/40778772113.pdfIn PDF document text
    • http://fipjp.com/userfiles/file/zixidaro.pdfIn PDF document text
    • https://tcufroghouses.com/wp-content/plugins/formcraft/file-upload/server/content/files/160706f5827890---17339461384.pdfIn PDF document text
    • http://www.marcelasemper.com/wp-content/plugins/formcraft/file-upload/server/content/files/160d9ead9b4a4c---13103298317.pdfIn PDF document text
    • http://phayaotechno.com/UserFiles/File/luwotejexanatuteki.pdfIn PDF document text
    • http://grupogmec.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b2319fa4d37---libime.pdfIn PDF document text
    • http://assessmentinsight.com/ckfinder/userfiles/files/48878209404.pdfIn PDF document text
    • http://omniatel.it/wp-content/plugins/formcraft/file-upload/server/content/files/160f0aa363f5bc---selamupifufexipo.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/GLLx1DTH0VQ/uplcv?utm_term=novoland+the+castle+in+the+sky+actorsPDF link annotation
    • https://bxthirteen.wpengine.com/wp-content/plugins/super-forms/uploads/php/files/2619ba1cfac216d1b95dbff740e091af/xalavakupaniti.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 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0001290e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1290E 165668 bytes
SHA-256: de712a14dedf90a17b884d413ebe33df67904f6fbf9f5630457e987ab65d9548
font_01_sfnt_off0002c1ab.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x2C1AB 10716 bytes
SHA-256: 19a198b57a20a62ff8301ded24de2c627db51e99f1941b4868d6d682581836bd
font_02_sfnt_off0002da3a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x2DA3A 17240 bytes
SHA-256: a5d74354dccf09c66e015838a34b632423f20216d4a5fee889560149e85e3536
font_03_sfnt_off00030640.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x30640 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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