Malicious PDF — malware analysis report

Static analysis result for SHA-256 7e0ab1ff4afc8ce0…

MALICIOUS

PDF

88.8 KB Created: 2021-09-02 04:46:40 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-16
MD5: ae2e489f5b82a3e91b9c9f1a6c62c364 SHA-1: 9a23b3e1a299112ea0772cf4a094488863785a80 SHA-256: 7e0ab1ff4afc8ce05cfa35cbddd935fe8d14af588025743b8f3c498267aa5696
156 Risk Score

Malware Insights

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

The PDF file was flagged by ML classifiers and ClamAV as malicious, specifically as a phishing trojan. It contains numerous links, many pointing to compromised CMS uploads or disposable hosting, suggesting a link farm designed to redirect users. The primary attack pattern involves exploiting user trust through a seemingly innocuous document to lead them to malicious or phishing websites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9987

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://sowa-architekci.pl/userfiles/files/76395194238.pdf In PDF document text
    • https://kurek-rowery.pl/user_pict/file/3413457483.pdfIn PDF document text
    • https://aodaixuan.vn/app/webroot/upload/image/files/13887394434.pdfIn PDF document text
    • https://pluckywize.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a8d26f5ee2d---24785090840.pdfIn PDF document text
    • http://lnimeina.it/userfiles/files/22116042260.pdfIn PDF document text
    • https://thejinglelab.com/wp-content/plugins/super-forms/uploads/php/files/vroepr7bquqfregh8i1rpvh9dt/jafasa.pdfIn PDF document text
    • https://www.toptalentusa.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607361196da95---tekelewajirijenuwe.pdfIn PDF document text
    • http://www.akutrans.com/wp-content/plugins/formcraft/file-upload/server/content/files/16070553c97a1b---86472763303.pdfIn PDF document text
    • http://unipell.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/160984d028b4b9---zinimosunagenezuwoba.pdfIn PDF document text
    • https://karinbentum.nl/uploads/file/nebawalaveg.pdfIn PDF document text
    • https://luminex.pl/upload/file/gikemedonafebikibivopi.pdfIn PDF document text
    • http://brownewingfamily.com/clients/a/a4/a4d7a48ed280e719b438ae57db99af5e/File/51874534098.pdfIn PDF document text
    • http://stillwaterponies83.com/clients/74660/File/31234342610.pdfIn PDF document text
    • http://malir-naterac.info/UserFiles/File/57157695599.pdfIn PDF document text
    • https://www.pal-kont.hu/wp-content/plugins/super-forms/uploads/php/files/225d2b3106572e593295481d96e51275/runutimadi.pdfIn PDF document text
    • http://www.hz-kontejnery.cz/ckfinder/userfiles/files/22656858106.pdfIn PDF document text
    • https://almoheetmanpower.com/public_html/userfiles/file/57335033424.pdfIn PDF document text
    • https://sreekanakananda.com/ckfinder/userfiles/files/gezomesasasutu.pdfIn PDF document text
    • https://pyhm.ca/wp-content/plugins/super-forms/uploads/php/files/n7r4fjka6k1l3mb6j6o1b2ahqi/10548544018.pdfIn PDF document text
    • https://www.andeanskyline.com/wp-content/plugins/formcraft/file-upload/server/content/files/16100016af1c77---susegaxowanivisesabawowi.pdfIn PDF document text
    • http://www.champcaregivers.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609dcfe07174d---lamazoburogitanum.pdfIn PDF document text
    • http://sujitonweb.com/userfiles/files/fowatilugoxet.pdfIn PDF document text
    • https://apoc.com.au/wp-content/plugins/super-forms/uploads/php/files/726feb14cad6eb8373db276a9adcb9ec/senegebasowi.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/GLLx1DTH0VQ/uplcv?utm_term=harvest+moon+friends+of+mineral+town+cooking+recipesPDF 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_off0000f51d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF51D 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off00010d2f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10D2F 17428 bytes
SHA-256: f87e824d366e808dd1731649a3da4c870689f6bcbc24c96a0699759d2da2ebf8
font_02_sfnt_off00013a7b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13A7B 11196 bytes
SHA-256: cff6fd0aee12460eef4d2345c1c03b21c32b775b6d323325d83dca539e9a0c5c

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