Malicious PDF — malware analysis report

Static analysis result for SHA-256 2d17a53df56c3f41…

MALICIOUS

PDF

94.9 KB Created: 2021-06-27 04:27:50 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-09-14
MD5: 0075d4cb7d0db1a62460a2bf560b0c90 SHA-1: 52c6a3ff7342d5ea532d9ee85e41963014197e9b SHA-256: 2d17a53df56c3f41e6a1c41f3017ca30ddbef7762035cd16adf6368a1127531e
164 Risk Score

Malware Insights

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

The PDF contains a link farm pointing to multiple compromised WordPress sites and disposable hosting, indicating a phishing or malware distribution attempt. The ML classifier and ClamAV detection strongly suggest malicious intent, likely to lure users to malicious content or downloads. No scripts were extracted, and the document body was unreadable, but the URL structure and heuristic firings are sufficient for a high-confidence assessment.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9957

Heuristics 7

  • 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.
  • Urgency / deadline lure low SE_URGENCY_LURE
    Document contains urgency or deadline language ('account will be terminated', 'action required within 24 hours', etc.) — useful context, but low-signal without other findings
  • 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://qboardapp.com/wp-content/plugins/super-forms/uploads/php/files/fd2c9dc5ae63a131a8049a5ca7b559fc/24173345384.pdf In PDF document text
    • https://atraba-holding.com/userfiles/file/zevunatifeluja.pdfIn PDF document text
    • http://tyextractor.com/d/files/8312071446.pdfIn PDF document text
    • http://www.miamiairportlimo.net/wp-content/plugins/formcraft/file-upload/server/content/files/16091d2b6e72c4---45919137546.pdfIn PDF document text
    • https://invest.pl/userfiles/file/jofepotukavemosikedodif.pdfIn PDF document text
    • https://davebakeragency.com/wp-content/plugins/super-forms/uploads/php/files/11a61d0a22269a70e231e77ff90761b1/96077620007.pdfIn PDF document text
    • http://promador.pl/userfiles/file/22187839210.pdfIn PDF document text
    • http://actionelectric.pt/www/wp-content/plugins/formcraft/file-upload/server/content/files/160b2d161357d5---83926863861.pdfIn PDF document text
    • http://www.cuerpomenteyespiritu.es/wp-content/plugins/formcraft/file-upload/server/content/files/1607c4e35b3824---sazolediboteleralun.pdfIn PDF document text
    • http://busangh.com/attfile/fckimg/file///2021062481212_503217386.pdfIn PDF document text
    • https://www.davinci.dk/wp-content/plugins/formcraft/file-upload/server/content/files/16087261575ba5---miwoxusepo.pdfIn PDF document text
    • http://highgaincomposites.com/img/file/2021617182129.pdfIn PDF document text
    • https://atlastoursntravels.com/userfiles/file/lejasuwiwazilukovuri.pdfIn PDF document text
    • http://xn--80aab8aioy.xn--p1ai/userfiles/file/buluxilugewanusujeda.pdfIn PDF document text
    • https://observatoire-omic.org/documents/file/85764089467.pdfIn PDF document text
    • https://realwebguys.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609466a38a70d---xanojagigubovomexovujika.pdfIn PDF document text
    • https://motelandratecuci.ro/userfiles/file/76753449506.pdfIn PDF document text
    • http://www.pirac.org/wp-content/plugins/super-forms/uploads/php/files/fcfc09bdd33aa98ef8af1082432eead0/13069543361.pdfIn PDF document text
    • https://malabarmail.com/ckfinder/userfiles/files/29977453559.pdfIn PDF document text
    • http://eduomania.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606cd32e6a0aa---wikusexe.pdfIn PDF document text
    • https://www.cr-sdc.org/wp-content/plugins/super-forms/uploads/php/files/777285445cd7430d25e9ad5e7af101d5/xujojowixonibukunebipo.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/GLLx1DTH0VQ/uplcv?utm_term=testimonies+of+heaven+and+hell+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_off00011337.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11337 10692 bytes
SHA-256: d8292733ecc4c6b6ad69b3c156734ae052055e882754d08657fb92fcc1f06b07
font_01_sfnt_off00012b92.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12B92 16724 bytes
SHA-256: db777508c07f3259c6896528f390ab485bcbbd86d56a9d6ebe0293487e1494ab
font_02_sfnt_off00015685.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x15685 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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