Malicious PDF — malware analysis report

Static analysis result for SHA-256 eda713d20925c7ec…

MALICIOUS

PDF

83.9 KB Created: 2021-09-21 08:53:04 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-26
MD5: feea17ccef300fdc9af86c07331a08b5 SHA-1: 9a187bbd242b4e46b33a9c49adfcbc1131beef76 SHA-256: eda713d20925c7ec979a5edbd00b5a4ae92dc8225978cc9a5979a55050e53283
126 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF file was flagged by ML classifiers and ClamAV as malicious, specifically as a phishing trojan. It contains numerous embedded URLs that point to disposable hosting, characteristic of a link farm designed to redirect users to malicious content. The `PDF_SEO_DISPOSABLE_LINK_FARM` heuristic indicates a high volume of links to distinct, potentially disposable hosts, reinforcing the phishing or malware distribution intent.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9912

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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=download+mp4+fifty+shades+of+grey PDF link annotation
    • http://teaterskolen-efteruddannelsen.dk/ckfinder/userfiles/files/39951838304.pdfIn PDF document text
    • http://hndgyl.com/v15/Upload/file/202191182551497.pdfIn PDF document text
    • https://herfection.herfection.tw/upload/ckfinder_temp/files/20210908065641.pdfIn PDF document text
    • http://frutapac.com/ckfinder/userfiles/files/danij.pdfIn PDF document text
    • http://vagyonvedelemszolnok.hu/admin/fck_upload/file/godurorunu.pdfIn PDF document text
    • https://doublehaircenter.com/upload/ckfinder/files/bamabij.pdfIn PDF document text
    • https://penzion-palice.cz/content/vupaduwalisotixixaleb.pdfIn PDF document text
    • http://brezov-gaj.si/uporabnik/file/mukab.pdfIn PDF document text
    • http://anneadamslaw.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/45979322717.pdfIn PDF document text
    • http://karthikeyanjayaram.in/userfiles/file/nubefawikuwikazisaxatewo.pdfIn PDF document text
    • http://www.impactit.in/ckfinder/userfiles/files/linaniwivemes.pdfIn PDF document text
    • https://taipeitccia.org/CKEdit/upload/files/duriwufejevuloromesi.pdfIn PDF document text
    • https://www.accidentinjurylascruces.com/wp-content/plugins/super-forms/uploads/php/files/sbem66du6gi99vv02ohr9956si/30588639455.pdfIn PDF document text
    • http://psystems.gr/Administrator/uploads/userpics/OutPostImages/files/95223697478.pdfIn PDF document text
    • https://www.hsbofmn.com/ckfinder/userfiles/files/lupovekapezulifixufuk.pdfIn PDF document text
    • http://sakulchaiplace.com/Uploads/file/67409143288.pdfIn PDF document text
    • http://jurabos.nl/include/editor/file/47527644820.pdfIn PDF document text
    • http://delannahotel.com/user_img/file/22573706274.pdfIn PDF document text
    • http://franzoesischebulldoggen.eu/userfiles/file/winigologasatirepexoli.pdfIn PDF document text
    • https://skiclubraonbaccarat.fr/pdf/42694047841.pdfIn PDF document text
    • https://loonbedrijfschimmel.nl/userfiles/files/sokaxonobob.pdfIn PDF document text
    • http://paulabenveniste.com/UserFiles/file/38286615030.pdfIn PDF document text
    • https://iieng.org/editor/ckfinder/userfiles/files/76861276531.pdfIn PDF document text
    • http://tehpromyar.ru/media/file/10773652897.pdfIn PDF document text
    • http://1careglobal.com/upload/files/kiraxoxijoreset.pdfIn PDF document text
    • https://frennphotography.com/wp-content/plugins/formcraft/file-upload/server/content/files/161474209be875---59346968696.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_off0000e068.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE068 18144 bytes
SHA-256: a2bc1cb9c28cec4643537441f6ef2b691e567d38e23f2e5047df20a06fbe09d2
font_01_sfnt_off00010f69.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10F69 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off00012780.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12780 11224 bytes
SHA-256: 7437039540369c18b5f29a6cd970a545b22034b84048800b405b88d1ddea9a80