Malicious PDF — malware analysis report

Static analysis result for SHA-256 9d5617e27e6584cd…

MALICIOUS

PDF

80.1 KB Created: 2021-09-20 09:45:36 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: cee7195b798e508b07ef91291cf397fc SHA-1: 34272e4991639e752302ea29556569ad3831663b SHA-256: 9d5617e27e6584cd55e00bc9a181634ba990bb8449da5d5068c38ad7ec845cd3
164 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains embedded JavaScript and numerous external URIs, many of which point to compromised or disposable hosting. The heuristic 'PDF_SEO_DISPOSABLE_LINK_FARM' indicates the document is designed as a link farm, likely to distribute malware or phish for credentials. The embedded JavaScript, while not fully analyzed due to obfuscation, is a common vector for exploiting PDF vulnerabilities or initiating further malicious actions.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9960

Heuristics 7

  • 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.
  • Embedded JS stream low PDF_JS
    PDF references a /JS stream. Generic JavaScript is common in benign forms; specific dangerous APIs are scored by separate rules.
  • 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://talesma.com/E/file/72971783458.pdf
    • http://modelseafarm.com/kweb/ckfinder/userfiles/files/sirunavimapaxewetanasodef.pdf
    • http://www.ncstarim.com.tr/wp-content/plugins/super-forms/uploads/php/files/s9etnhg7gh7s71i6oje8mcahm2/kavunabokirifarifonisad.pdf
    • https://tele-video.ru/upload/files/11329668249.pdf
    • http://www.psychophonie-tarbes.com/ckfinder/userfiles/files/fonawasanokizosebavuxeraw.pdf
    • http://www.movingintofreedom.com/wp-content/plugins/formcraft/file-upload/server/content/files/1613774f728eb9---63898113378.pdf
    • https://macauroommate.com/ckfinder/userfiles/files/gadojipekikafolidatilu.pdf
    • http://solee56.com/ckfinder/userfiles/files/fasadizadowadedamugemurew.pdf
    • http://www.movingintofreedom.com/wp-content/plugins/formcraft/file-upload/server/content/files/16144cdf7478b2---7108898430.pdf
    • http://mmbassisiprovince.in/files/js/ckfinder/userfiles/files/gekabefunepuresajilexogit.pdf
    • http://structurecreative.com/wp-content/plugins/formcraft/file-upload/server/content/files/16147d80739fdb---462123162.pdf
    • http://meimagedance.tw/ufiles/files/87794219562.pdf
    • http://sashtraayurveda.com/ckfinder/userfiles/files/49095372208.pdf
    • http://jeugdopdewetenschapsagenda.nl/wp-content/plugins/formcraft/file-upload/server/content/files/161439104948b6---mapimesemura.pdf
    • http://maekalocal.com/Maeka/UserFiles/File/goleta.pdf
    • https://www.hadlowsecurityshutters.com/wp-content/plugins/super-forms/uploads/php/files/d220540f63d271f7d2a2e88251643b93/kakisuzosusogoketuxopedej.pdf
    • http://herium.net/FileData/ckfinder/files/20210918_81E5D2D7459515A7.pdf
    • http://bettaletroom.com/file_media/file_image/file/8858500452.pdf
    • https://totalyoumovement.com/wp-content/plugins/formcraft/file-upload/server/content/files/1613bdb802fb9c---bejigetiwulemareniru.pdf
    • https://diversifiedhumansolutions.com/wp-content/plugins/super-forms/uploads/php/files/9ce515555d782b509bb49af5fe8c5a36/9584702882.pdf
    • http://mayingiabao.com/upload/files/85723551558.pdf
    • http://www.jasolasia.com/image/upload/File/vodejumu.pdf
    • http://grgct.com/ckfinder/userfiles/files/kutas.pdf
    • https://feedproxy.google.com/~r/Uplcv/~3/1xuhb7AK25c/uplcv?utm_term=kinnporsche+novel+read+online
    • 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_off0000d63f.bin
da0c0d51e62595fde72ba53b14fe8ec4a11df07f65798fb12bc4c9ff0a8410b2
pdf-font-stream PDF embedded font (sfnt) at offset 0xD63F 17348 bytes
font_01_sfnt_off000102e9.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0x102E9 16792 bytes
font_02_sfnt_off00011b00.bin
46d8b27ba1604b7abe8756ae0ef4bf029a86a91f96d7d51436384d10b730a3b3
pdf-font-stream PDF embedded font (sfnt) at offset 0x11B00 10572 bytes