Malicious PDF — malware analysis report

Static analysis result for SHA-256 465701ebfb94d385…

MALICIOUS

PDF

83.5 KB Created: 2021-09-20 01:07:06 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-14
MD5: b3c1a42dde9f035dd5d4769169a46331 SHA-1: a88d849728a9decd8722dde858e302589de0c819 SHA-256: 465701ebfb94d3851f962a0c3c684bd00dc3e9770d32a50c9369c15b7ac3ee37
156 Risk Score

Malware Insights

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

The PDF file was flagged by a machine learning classifier and ClamAV as malicious, specifically as a phishing trojan. Heuristics indicate it functions as a link farm, directing users to multiple external URLs, some hosted on compromised CMS platforms or disposable domains. The presence of numerous URLs, including one pointing to a compromised WordPress upload, strongly suggests an attempt to distribute malicious content or phish for credentials.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9912

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://coretry.ru/uplcv?utm_term=seven+deadly+sins+4+streaming PDF link annotation
    • https://jagominum.com/contents/files/riwilisumonofiz.pdfIn PDF document text
    • http://pyhunlian.com/uploadfile/file/87160285908.pdfIn PDF document text
    • http://career-id.org/ckfinder/userfiles/files/bimupipigato.pdfIn PDF document text
    • http://safetruck.gr/images/file/35839348086.pdfIn PDF document text
    • http://longarmquiltacademy.com/fckeditor/userfiles/file/vaworo.pdfIn PDF document text
    • https://zenithservicos.com/userfiles/files/10028111981.pdfIn PDF document text
    • https://china-glass-mosaic.com/userfiles/files/20210906_095429.pdfIn PDF document text
    • http://pusancard.com/userData/board/file/kunemememimunolebesixixip.pdfIn PDF document text
    • http://thietbiytedaibao.com/media/files/vojodatosusiluke.pdfIn PDF document text
    • http://www.kevimotor-rock.hu/files/files/73233113305.pdfIn PDF document text
    • https://widerbet.pl/userfiles/file/zajovakaxoxonabamesexapo.pdfIn PDF document text
    • http://donovaly-ubytovanie-safran.sk/web/userfiles/file/91444678968.pdfIn PDF document text
    • http://lilit-realty.com/wp-content/plugins/super-forms/uploads/php/files/l86m4tsch6r70bpsdig4e03m21/54927257547.pdfIn PDF document text
    • https://sumangold.net.vn/wp-content/plugins/super-forms/uploads/php/files/smkjh7nrv9dibbch18hd9h1247/guwaremulu.pdfIn PDF document text
    • https://altinhediyeler.com/calisma2/files/uploads/20755323925.pdfIn PDF document text
    • http://sangtaoad.com/uploads/userfiles/file/82213911939.pdfIn PDF document text
    • https://curvy.tw/upload/files/sowikopizikowovurekewi.pdfIn PDF document text
    • https://repare-ton-smartphone.com/userfiles/file/39389349842.pdfIn PDF document text
    • http://lerucherdesanges.fr/userfiles/file/gosabeduk.pdfIn PDF document text
    • http://offerseir.com/basefile/offerseircom/files/vamunakuzime.pdfIn PDF document text
    • http://safiorida.nl/operatori/userfiles/file/2538346710.pdfIn PDF document text
    • https://www.dooleysnaturalgas.com/ckfinder/userfiles/files/kedut.pdfIn PDF document text
    • http://jnejendomsdrift.dk/userfiles/file/sofosuzenar.pdfIn PDF document text
    • https://toppelletmachine.com/d/files/monuxowonitebojux.pdfIn PDF document text
    • http://uniondeautoescuelas.com/wp-content/plugins/formcraft/file-upload/server/content/files/16134c788d1a82---19079587754.pdfIn PDF document text
    • http://paymentsbusiness.ca/wp-content/plugins/formcraft/file-upload/server/content/files/161306bb59cb4c---nekosijuwalabinigokip.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e0e4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE0E4 10804 bytes
SHA-256: 84bb78cdd7abf23f85d808bd5680a8712cea9bb79ad749281e22027bd55cd52e
font_01_sfnt_off0000f9a8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF9A8 17968 bytes
SHA-256: 0b6337d27d2623d5b76c20eb036dd9f98f916e160ad70cc2ef999702490ccaa5
font_02_sfnt_off00012847.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12847 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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