Malicious PDF — malware analysis report

Static analysis result for SHA-256 ed195e05c7460331…

MALICIOUS

PDF

92.0 KB Created: 2021-09-01 19:25:23 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-16
MD5: 36a8f67a1af640e6f3f8b63ab8c5bb0f SHA-1: ae4f9cdd7224a14af7c20f0e843487e09fd6fb36 SHA-256: ed195e05c74603316dfd856815fff7e8764262e10c4cfe3c24ff2ba5171a19ba
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains numerous links to external websites, many of which are hosted on compromised WordPress sites or disposable domains, indicating a link farm designed to redirect users to malicious content. The ClamAV detection and ML classifier strongly suggest malicious intent, likely phishing or malware distribution. Although no scripts were explicitly extracted, the PDF structure and embedded URLs are indicative of techniques used to redirect users to potentially harmful sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9970

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://catamma.ru/uplcv?utm_term=applying+ethics+a+text+with+readings+11th+edition+pdf PDF link annotation
    • http://teplospectr.ru/images/files/91600441344.pdfIn PDF document text
    • http://cherryontop.pl/upload/fotki/file/56052894281.pdfIn PDF document text
    • http://villaturri.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609d0dd73bce3---86821444553.pdfIn PDF document text
    • https://ateneoarbonaida.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609b018a0b914---21378953888.pdfIn PDF document text
    • http://www.lifestaralberta.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b1687730a53---dunaripomunorugix.pdfIn PDF document text
    • http://evohome.pl/userfiles/file/83731145461.pdfIn PDF document text
    • http://booklandbooks.com/userfiles/file/1452344889.pdfIn PDF document text
    • http://cnp-inc.com/ckupload/files/zebapisanugesajepavebe.pdfIn PDF document text
    • http://hicoweld.com/shop/fck_file/file/sadoritirof.pdfIn PDF document text
    • https://activepymes.com/pub/file/farigobojepifi.pdfIn PDF document text
    • https://jairdefreitas.com/ckfinder/userfiles/files/luwarusiwexawilatofus.pdfIn PDF document text
    • http://viaterrestre.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/16088001f78f3f---27201058239.pdfIn PDF document text
    • https://yournew.site/wp-content/plugins/super-forms/uploads/php/files/hvtnos7ejlt4sueuk15g3bns9t/83165702801.pdfIn PDF document text
    • http://thrifty-uy.com/files/others/30446014732.pdfIn PDF document text
    • https://technische-dokumentation-hoffmann.com/upload/files/62996246761.pdfIn PDF document text
    • https://sandzak.best/wp-content/plugins/super-forms/uploads/php/files/7hhcom5ukmr3h443sgtcm42rd8/burazogemebexizeva.pdfIn PDF document text
    • http://prodottoitalia.eu/userfiles/files/60101295256.pdfIn PDF document text
    • https://www.c2commercial.com/wp-content/plugins/super-forms/uploads/php/files/eaa08a2630d021462a0d6a3b901ecada/55468282204.pdfIn PDF document text
    • https://expresstestingatl.com/wp-content/plugins/super-forms/uploads/php/files/58f5e3686db97d79a310595d4d6b3e94/39590969055.pdfIn PDF document text
    • http://balassalaw.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/3606256130.pdfIn PDF document text
    • http://ecoaga.com/documentos/file/wululekewejakojebuto.pdfIn PDF document text
    • http://snookerfootball.eu/wp-content/plugins/formcraft/file-upload/server/content/files/1607b1fcac76d5---letotenuda.pdfIn PDF document text
    • http://www.elsecretodelolivo.com/wp-content/plugins/formcraft/file-upload/server/content/files/160d66f2fee6e2---10759163179.pdfIn PDF document text
    • http://mmdplus.com/userfiles/files/20210703_040825.pdfIn PDF document text
    • http://orkoien.com/userfiles/files/32478801223.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_off0000fcf9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFCF9 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0001150b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1150B 18984 bytes
SHA-256: 15fc8dc1d3582a976f03f81cbc6ac4492bfd1d65ad9fe8f5a2b685d147785ca2
font_02_sfnt_off00014664.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x14664 11236 bytes
SHA-256: 471db27cd350b368875e14a6d1ff79540ef88fb47cc9ff9d60e76d595a4b2e8c

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