Malicious PDF — malware analysis report

Static analysis result for SHA-256 a971209e8e942499…

MALICIOUS

PDF

86.7 KB Created: 2021-07-02 13:21:15 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: faddaea1529fc9ba1ae6573ed8365d31 SHA-1: e7fcd14ac78023f03d612864ba43ee196d9c3b30 SHA-256: a971209e8e942499ad816303bc4480e9e1ca197f85211b04a80c050c0c8544d6
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

The PDF document contains numerous embedded URLs, many of which point to compromised websites or disposable hosting, indicating a link farm designed to redirect users. The ClamAV detection and ML classifier strongly suggest malicious intent, likely phishing or malware distribution through these links.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9964

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 http://manavpublicschool.org/manav/userfiles/file/bifopa.pdf
    • http://beiwendq.com//data/attachment/file/43496800113.pdf
    • https://braviengenharia.com.br/wp-content/plugins/super-forms/uploads/php/files/3c0lr11ng4i48r6q1aqkgg5eqk/maperajerap.pdf
    • https://lerong.vn/wp-content/plugins/super-forms/uploads/php/files/e7ca37b6154f714cb5f1e9854b23405b/modor.pdf
    • http://dynamic1984.com/user_file/file/farurotasoraguzota.pdf
    • https://actioncoach.com.my/wp-content/plugins/formcraft/file-upload/server/content/files/1608fb4ec53fd1---93175219641.pdf
    • http://www.britocunhaadvocacia.com.br/home/wp-content/plugins/formcraft/file-upload/server/content/files/16077c77894ba1---fodixibakuwejaxa.pdf
    • https://glbtrader.com/userfiles/file/pofekomilepenux.pdf
    • https://omomediacion.com/wp-content/plugins/super-forms/uploads/php/files/6dc5781c6256447bf49d4312e7e931e5/15570078729.pdf
    • http://symbioticlifetech.org/attfile/fckimg/file///2021060219509_991107906.pdf
    • http://laduses.nl/image/file/40901062684.pdf
    • https://avis-medical.ma/wp-content/plugins/super-forms/uploads/php/files/25a5068b453bd03b00026e8ad759dd7d/gosawet.pdf
    • https://rumusjitu.com/contents//files/47741530170.pdf
    • http://kiuanai.com/userfiles/file/2967356186.pdf
    • http://wib24-admin.de/uploads/file/monanarigomosesen.pdf
    • http://bajcsidavidfoto.com/_user/file/dosexafiz.pdf
    • https://www.sharpeningfactory.com/wp-content/plugins/formcraft/file-upload/server/content/files/160701b27a743a---zumenizejeronuno.pdf
    • http://sattamatkapatti.com/userfiles/file/zijojugoguvukofax.pdf
    • http://allamericannursing.com/userfiles/file/vatuvalosurudovozipofopil.pdf
    • http://middlegeorgiacoinclub.com/wp-content/plugins/formcraft/file-upload/server/content/files/16098784fdd374---fazimodutoxiloba.pdf
    • https://leo-translate.com.ua/wp-content/plugins/formcraft/file-upload/server/content/files/16088760680b04---mirepodenig.pdf
    • https://senzedigicraft.com/wp-content/plugins/super-forms/uploads/php/files/4a6d35db371ea0ddca23602191d8b0b4/tifowisot.pdf
    • https://feedproxy.google.com/~r/skout/mBVl/~3/fzgW7-mxBc0/uplcv?utm_term=duff+mckagan+it%27s+so+easy+and+other+lies+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_off0000eb48.bin
f24cd55ea01a997f4d1abc062b3d7655350a0c271cf14f030750cce8d40b8475
pdf-font-stream PDF embedded font (sfnt) at offset 0xEB48 11408 bytes
font_01_sfnt_off000105ee.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0x105EE 16792 bytes
font_02_sfnt_off00011e00.bin
1ff262cf1c449df91d2c0aa466debe544e98348a8a68eeb16e1bdbc849c77e83
pdf-font-stream PDF embedded font (sfnt) at offset 0x11E00 17384 bytes