Malicious PDF — malware analysis report

Static analysis result for SHA-256 7c3ea5c5a58eeef3…

MALICIOUS

PDF

83.6 KB Created: 2021-09-15 18:59:35 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: f1d9328aeb1c49b81f3bab9c58244879 SHA-1: 9617fa4f06eaf05a19100cbf10427db4c86c9fbb SHA-256: 7c3ea5c5a58eeef3df587d5534ecd7a6b94c1481002872f5fe5bcb6741cbea09
146 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF file was flagged by multiple heuristics as malicious, including a critical ClamAV detection for 'Pdf.Phishing.Trojan'. It contains numerous external URIs, with one pointing to a raw IP address, suggesting an attempt to redirect users to potentially harmful content. The PDF_SEO_DISPOSABLE_LINK_FARM heuristic indicates the document is designed as a link farm on disposable hosting, reinforcing the phishing or malware distribution motive.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9955

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • Clickable URI points to raw IP address medium PDF_URI_IP_LITERAL
    PDF contains a clickable HTTP(S) action whose host is a literal IPv4 address. Legitimate documents normally link to named domains; raw-IP destinations are common in disposable phishing and malware-delivery infrastructure.
  • 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 http://schokoladenfontaene.de/idata/57182351089.pdf
    • https://patriciogaete.com/upload/file/5814148445.pdf
    • http://radio-salsa.com/php/rs/filesupload/file/89616681338.pdf
    • http://anindecor.pl/files/file/fimaxutawamaretukojojowu.pdf
    • http://morecoredesign.com/images/imageUps/files/rugenegomup.pdf
    • http://104.156.58.56/~web2inbox/wp-content/plugins/formcraft/file-upload/server/content/files/16133761d31de3---vobozatamiwakalowet.pdf
    • https://giritrademark.com/content_files/files/vatowatefonojasamerim.pdf
    • http://jjw-led.com/userfiles/file/13460691898.pdf
    • http://qapoll.com/2015/vat/upload/files/54300343787.pdf
    • http://etcpremium.com/userfiles/files/tifugiduji.pdf
    • http://globalcenterhotels.com/bot/ckfinder/uf/files/sowebigopovarivepitiza.pdf
    • https://otterdisplay.com/userfiles/file/zubasufu.pdf
    • http://paneldeconso.com/userfiles/file/43679165283.pdf
    • http://www.corazondelsol.es/ckfinder/userfiles/files/52250808472.pdf
    • https://leresto-niort.fr/images/userfiles/files/wituken.pdf
    • http://xn----9sbkvfu2aex3d.xn--p1ai/ckfinder/userfiles/files/bogigatemaluxudow.pdf
    • http://gamax-motor.cz/data/dokumenty/66117498030.pdf
    • http://canhtoanland.com/upload/files/banazujisebenixukuloza.pdf
    • http://solemarservizi.it/userfiles/files/31680241769.pdf
    • https://ngenadmin2.nextgenphotosolutions-beta.com/app/webroot/files/file/6912903572.pdf
    • http://coimbrasoftware.hu/images/uploads/files/58310595120.pdf
    • http://lustigersteirer.at/userfiles/file/zuzilunilarev.pdf
    • https://commonwealthsportsawards.com/userfiles/file/kevasewulifosesajejetaw.pdf
    • https://feedproxy.google.com/~r/skout/mBVl/~3/LPIa9PGmDLg/uplcv?utm_term=how+to+download+music+from+macbook+to+android
    • http://irodori.kir.jp/files/file/95584807434.pdf
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/
    • http://dejavu.sourceforge.net
    • http://dejavu.sourceforge.net/wiki/index.php/License

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e068.bin
dd587b8e6b2fb16db253df20bea0265426e574360813aaeb846bbf40a907d240		 pdf-font-stream PDF embedded font (sfnt) at offset 0xE068 18368 bytes
font_01_sfnt_off00010f42.bin
1d853dac98aaca6a32e766b10967faacf6eb057ade9f44140bdb68350aec4ab6		 pdf-font-stream PDF embedded font (sfnt) at offset 0x10F42 10912 bytes
font_02_sfnt_off00012888.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1		 pdf-font-stream PDF embedded font (sfnt) at offset 0x12888 16792 bytes

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