Malicious PDF — malware analysis report

Static analysis result for SHA-256 f7013fc989e9890d…

MALICIOUS

PDF

92.5 KB Created: 2021-09-05 09:24:29 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-05
MD5: 28f1e4d36e4d7ddf3b6e994c983b9a91 SHA-1: 577a76b95b47386831dd558a606ae3125e54b987 SHA-256: f7013fc989e9890d30ab0b1e86dfefd8892f42223d27f8c33b00ca50a1d79c6f
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains numerous links to external websites, many hosted on compromised CMS platforms, suggesting a link farm or phishing lure. The ClamAV detection and ML classifier strongly indicate malicious intent, likely related to phishing or malware distribution. While no scripts were explicitly extracted, the structure and URL patterns are consistent with a malicious PDF designed to redirect users to harmful content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9971

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 http://www.theflightfest.com/wp-content/plugins/formcraft/file-upload/server/content/files/160965de835e36---nitivutolumapumaxex.pdf In PDF document text
    • http://adria-ex.com/images/blog//file/50422849949.pdfIn PDF document text
    • http://anadarkogomezfamily.com/clients/7/76/76920377ef4e0cfe2c6e77079a05cbd4/File/majavipebozifojonudebe.pdfIn PDF document text
    • https://www.hadlowsecurityshutters.com/wp-content/plugins/super-forms/uploads/php/files/a2705f6952f6b29080a9746ab03c5ef9/zesoteros.pdfIn PDF document text
    • https://benchmarktransitions.com/wp-content/plugins/formcraft/file-upload/server/content/files/160d77640a6ec6---futeriwavefaj.pdfIn PDF document text
    • https://solarconsulting.org/wp-content/plugins/super-forms/uploads/php/files/9da682c44bc1d052df24935ad2089944/nuleb.pdfIn PDF document text
    • http://wghsclassof69reunion.com/clients/b/b3/b33699c65747f61a54cd06c2fab73d22/File/nubiriwubobabumogugurexe.pdfIn PDF document text
    • http://botosani.ro/img/uploads/file/fupukavaminasosuda.pdfIn PDF document text
    • http://lindendirect.com/tempimg/file/15592060073.pdfIn PDF document text
    • https://rowanmkt.com/Uploads/ckfinder/userfiles/files/gezebobutijujimegu.pdfIn PDF document text
    • https://medtek.vn/storage/file/zotijuwi.pdfIn PDF document text
    • https://electrodomesticaruano.com/images/ckfinder/files/71507244013.pdfIn PDF document text
    • https://elitestrategyglobal.com/wp-content/plugins/super-forms/uploads/php/files/8555bc71fb341defcde51535ec56f430/zanutinisibevudefusuboxas.pdfIn PDF document text
    • http://mulroyenvironmental.ie/userfiles/file/96743502067.pdfIn PDF document text
    • http://fashioncenterpoint.com/wp-content/plugins/super-forms/uploads/php/files/e765b3b22d24a39277cbfcc0d79844e6/vojafezez.pdfIn PDF document text
    • https://robertmatzuzi-massagetherapist.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/160a2cec0ace63---18173624742.pdfIn PDF document text
    • https://aquaticlandscape.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608bc509aa90c---sexigudusizoluzan.pdfIn PDF document text
    • http://tks-forever.com/upload/2021/08/15/file/dodolotipak.pdfIn PDF document text
    • http://gemculture.com/userfiles/file/80234505142.pdfIn PDF document text
    • http://dxqzx.com/ckfinder/userfiles/files/20210728_100433.pdfIn PDF document text
    • https://www.sevgiliyevideo.net/wp-content/plugins/formcraft/file-upload/server/content/files/16113889fb3ca7---xixirititezezunenumubesuk.pdfIn PDF document text
    • http://amesonsofallen.org/clients/53156/File/96343299605.pdfIn PDF document text
    • http://hoshitorionline.com/uploads/files/34320493740.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/YTWXjIUwRh0/uplcv?utm_term=holt+mcdougal+literature+grade+12+answer+key+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_off00010072.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10072 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off00011884.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11884 18536 bytes
SHA-256: ce9075f0e93237c62f4b760c5687942e52897446580cf14aad6bb788fcad344a
font_02_sfnt_off0001485f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1485F 11520 bytes
SHA-256: b124d32a6f183b07a11fc05650efe34998adbee296f7b2f358f8f13bf0f6c555

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