Malicious PDF — malware analysis report

Static analysis result for SHA-256 f474fc4297ff9ca7…

MALICIOUS

PDF

70.0 KB Created: 2021-09-20 03:15:46 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-16
MD5: 58ec1036c5828e3f5d0003a6c07192aa SHA-1: 78e83d4f502851844c768c472c6658845b02a7b6 SHA-256: f474fc4297ff9ca730fec71b16c99dc3ca81f522a0323b6d5307d05800b43f4b
126 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The file was detected as malicious by ML classifiers and ClamAV, indicating a high likelihood of malicious intent. It contains numerous embedded URLs, many of which point to potentially malicious domains, suggesting a phishing or malware distribution scheme. The PDF structure and embedded content are consistent with attempts to redirect users to external sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9975

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://afmiletisim.afmiletisimajansi.info/resimler/files/22993157930.pdf In PDF document text
    • http://foto-recepty.sk/images/fotky/7312073398.pdfIn PDF document text
    • https://kingcarmotorista.net/uploads/files/lipotusek.pdfIn PDF document text
    • http://blbr365.com/userfiles/file/1630771466.pdfIn PDF document text
    • http://cadelupo.it/userfiles/files/lonebumerapogixo.pdfIn PDF document text
    • http://buren-kompanie.de/userfiles/files/69589534253.pdfIn PDF document text
    • http://adhunikjewellers.com/ckfinder/userfiles/files/rebafu.pdfIn PDF document text
    • http://hublihorse.com/uploads/userfiles/files/perulepojirafaroburavem.pdfIn PDF document text
    • https://sanipro.ma/app/webroot/uploaderfiles/35712138837.pdfIn PDF document text
    • http://theeultimatenetworker.com/ckfinder/userfiles/files/satakiwamodipasoga.pdfIn PDF document text
    • http://yer-krasnodar.ru/ckfinder/userfiles/files/gegopubuzituviwelipi.pdfIn PDF document text
    • https://pastelbuilders.com/userfiles/file/subadufo.pdfIn PDF document text
    • http://mobilni-kadernictvi.cz/files/file/9386990193.pdfIn PDF document text
    • http://comlark.ru/userfiles/files/95821967169.pdfIn PDF document text
    • http://asesoriagarpe.com/wp-content/plugins/formcraft/file-upload/server/content/files/161437cfd1ff83---mejusorel.pdfIn PDF document text
    • https://vibangthuaphatlai.net/uploads/files/97365437001.pdfIn PDF document text
    • https://lacausedeslivres.com/userfiles/file/78481911373.pdfIn PDF document text
    • http://drsuthichai.com/userfiles/files/nojijonexavus.pdfIn PDF document text
    • https://hygradeinsulators.com/images/uploads/file/bokijavekufuxuginoreturoz.pdfIn PDF document text
    • http://superfishinglewood.com/uploads/files/kifuwetubaf.pdfIn PDF document text
    • http://ville-dammarie.com/ckfinder/userfiles/files/ladikaja.pdfIn PDF document text
    • http://nwhouse.ru/uploads/file/kaweluveda.pdfIn PDF document text
    • http://kartinatv.org/uploads/files/tuxiloxatagetubasijamaj.pdfIn PDF document text
    • https://nakatarikaszel.pl/app/webroot/userfiles/file/97655432438.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/1xuhb7AK25c/uplcv?utm_term=top+10+websites+to+get+free+instagram+followersPDF 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_off0000b4b4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB4B4 14448 bytes
SHA-256: 84c38824d592e988baa3c6bd5cbaaf5b2a4d68318b5eda6cf361ea20edc21ca0
font_01_sfnt_off0000d8e5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD8E5 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off0000f0fc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF0FC 11064 bytes
SHA-256: 9d7e8f5530508e3e71fdba43e3dd973956be2e9debd14b1fe988c8a68e64b795

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