Malicious PDF — malware analysis report

Static analysis result for SHA-256 095d9f6eefa53849…

MALICIOUS

PDF

131.2 KB Created: 2021-09-04 11:24:27 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-05
MD5: 880d615e07101766e31da0096c5ffe5d SHA-1: 4469cb95ff6ebf98e0c03fcce23d1ff6738a76e5 SHA-256: 095d9f6eefa53849253b0ffb4de8b43ac63e0fe54a43501c48024635ad2bce54
156 Risk Score

Malware Insights

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

The PDF file was flagged by ClamAV as Pdf.Phishing.Trojan and a machine learning classifier indicated a high probability of maliciousness. Heuristics identified it as a link farm pointing to compromised CMS uploads and disposable hosting, suggesting an attempt to redirect users to malicious sites. No scripts were extracted, but the structure and URL patterns are indicative of a phishing or malware distribution lure.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9944

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://qualitycountscleaning.com/wp-content/plugins/super-forms/uploads/php/files/7f6a97428c0c771304240ceb1cd64328/jonogimeruwegisaba.pdf In PDF document text
    • https://cfbadalona.net/ckdata/files/pezewixedasonika.pdfIn PDF document text
    • http://gf-location.fr/wp-content/plugins/formcraft/file-upload/server/content/files/1609b32d5b9431---66425131624.pdfIn PDF document text
    • https://buddingheights.org/wp-content/plugins/formcraft/file-upload/server/content/files/16094073d85595---niwewimumuligitorarawo.pdfIn PDF document text
    • http://archgeo-leszno.pl/uploads/userfiles/files/67730731158.pdfIn PDF document text
    • http://imobiliariaimperio.com/files/files/medivarolezelilogar.pdfIn PDF document text
    • https://muzeumkonstancina.pl/attachments/file/68586464544.pdfIn PDF document text
    • http://www.bsa.by/ckfinder/userfiles/files/18325811154.pdfIn PDF document text
    • http://www.thediethub.in/wp-content/plugins/formcraft/file-upload/server/content/files/1608c7a17f3123---veresopufedijopaxurapub.pdfIn PDF document text
    • http://hnkingdee.cn/Files/file/2021625145937.pdfIn PDF document text
    • https://inunekocp.jp/mailmagazine/upload/files/61166249185.pdfIn PDF document text
    • http://expertcomptablecourreges.fr/michel_courreges/userfiles/file/99441003524.pdfIn PDF document text
    • http://keysrotary.com/clients/d/da/da683cbc30bfd632b0b364d14bdd38fd/File/duzevimibapefu.pdfIn PDF document text
    • http://staractivecollection.com/resimler/site/files/detobaloxa.pdfIn PDF document text
    • https://aarhuskortet.dk/images/file/24463147379.pdfIn PDF document text
    • http://szpital-sulecin.pl/images/fckfiles/file/93826071110.pdfIn PDF document text
    • http://xn----8sbnbd9chja.xn--p1ai/userfiles/file/17429729865.pdfIn PDF document text
    • http://www.tif.cn/wp-content/plugins/super-forms/uploads/php/files/u41aqbrt92vp295dka11bjncva/jisexapewarujukaka.pdfIn PDF document text
    • https://www.golddustdental.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609b79a294ae4---nokigerijirovoxapokanafi.pdfIn PDF document text
    • http://alicekhenrylawoffice.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/39747525116.pdfIn PDF document text
    • https://noble-worldwide.com/wp-content/plugins/super-forms/uploads/php/files/ae1f8413c9b7284e94b21523da7cb2e1/10621146244.pdfIn PDF document text
    • http://www.amedna.com/userfiles/files/51077980132.pdfIn PDF document text
    • https://414movement.com/wp-content/plugins/super-forms/uploads/php/files/714f0565fd4d4967d4b6ef831a1482fc/gakomafifalinekewixovis.pdfIn PDF document text
    • https://pasarangroup2.com/contents/files/9370804389.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/BvfzZFkJO3s/uplcv?utm_term=bosch+ovn+pyrolyse+manualPDF 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_off000197e0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x197E0 20948 bytes
SHA-256: 51676df7f89fdbc9e3d8273503b9aef465ce80b1571fdad63873b0d861a31fc2
font_01_sfnt_off0001ce25.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1CE25 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off0001e63c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1E63C 10780 bytes
SHA-256: e2a5a150b925b74ff92211757e3d2e78e16f66c5bc256e95583a2b8a63f5df4e