Malicious PDF — malware analysis report

Static analysis result for SHA-256 ba3acda10683f567…

MALICIOUS

PDF

98.5 KB Created: 2021-07-05 06:52:42 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: fa4cd802b2446feef365bcb4a27d38a3 SHA-1: a8a9fe01e98e9fc3c8415d7f12fad55795402e73 SHA-256: ba3acda10683f5671ac7710213e3b919fee77d789d8d5906363978809027dd94
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains numerous links to compromised websites, indicating a link farm designed to redirect users to malicious content. The ML classifier and ClamAV detection strongly suggest malicious intent, likely for phishing or malware distribution. Although no scripts were explicitly extracted, the PDF structure and embedded URLs point towards an attempt to exploit users by directing them to potentially harmful sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9906

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://www.thebetterinsurance.com/wp-content/plugins/formcraft/file-upload/server/content/files/16094789edb708---17737787346.pdf
    • https://myphambambi.com/webroot/img/files/nudufirojakenef.pdf
    • http://www.adatechotomasyon.net/wp-content/plugins/formcraft/file-upload/server/content/files/1609843681730d---simokadomarodulutixubik.pdf
    • https://floorco.allianceflooring.net/wp-content/plugins/super-forms/uploads/php/files/5be774454449a2ed4cdb7b4bc05ef819/gezinarajeleboluje.pdf
    • http://bjhtdszdh.com/v15/Upload/file/202151987213916.pdf
    • http://mattstergamer.com/wp-content/plugins/super-forms/uploads/php/files/7ruqv8al87h8n00pcqpos7p33g/11494087628.pdf
    • http://leap-egypt.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606fdcb52752e---78568745747.pdf
    • http://vtracauto.com/wp-content/plugins/formcraft/file-upload/server/content/files/160bbd42b3f2a0---85352370538.pdf
    • http://vibrosystem.ro/wp-content/plugins/formcraft/file-upload/server/content/files/160b8c8c65940f---fixibivuzoxujika.pdf
    • http://barcabianca.eu/upload/file/9742045178.pdf
    • https://www.hdontheroadnapoli.it/wp-content/plugins/formcraft/file-upload/server/content/files/160b53005189f9---28206914108.pdf
    • https://blagoustroystvo24.ru/ckfinder/userfiles/files/kunalezafasulezova.pdf
    • http://wakingbeauty.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b25921d3238---33939912458.pdf
    • https://barcelonacentremedic.cat/files/galeria/files/kotumelafelido.pdf
    • https://acronimocostanzo.com/userfiles/file/46570746870.pdf
    • https://qboardapp.com/wp-content/plugins/super-forms/uploads/php/files/6e1ad288b27bcef29602f58e97922924/kajubosus.pdf
    • https://www.booster-p.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a0c281cd592---75265512556.pdf
    • http://payassistinc.com/wp-content/plugins/formcraft/file-upload/server/content/files/160982848ac978---bipom.pdf
    • http://carefirstwalkathon.com/clients/8/89/89514deb4c0e8807eb046cac28c4977f/File/58663662837.pdf
    • http://edsmithestate.com/clients/8/8f/8fcea3baa00381bb68ca4dcda22eb4c7/File/goputosewapalesigorewos.pdf
    • https://ludifrance.fr/userfiles/file/55150866033.pdf
    • http://didula.com/img/file/86516698972.pdf
    • https://auf.vn/wp-content/plugins/super-forms/uploads/php/files/karer4q2q3k28jmqmspnu5c552/wefakiwif.pdf
    • https://feedproxy.google.com/~r/Uplcv/~3/cv9VXjIrmdE/uplcv?utm_term=famous+sal%27s+pizza+new+port+richey
    • 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 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000ffe3.bin
2d1d24974b8282dfdd2268a21f7cf26d5ba619f1f1a3a5190ae54166d0138f2e
pdf-font-stream PDF embedded font (sfnt) at offset 0xFFE3 11008 bytes
font_01_sfnt_off00011971.bin
7bb558c053dc4e043e6ec2b99395c9865f054a5c24d8cc6c1cc1224a35179b35
pdf-font-stream PDF embedded font (sfnt) at offset 0x11971 16892 bytes
font_02_sfnt_off00013130.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0x13130 16792 bytes
font_03_sfnt_off00014942.bin
67ed1b4c1e031829a5ab5a05aaea77856e7a36ad1c751c7d874dc363e3ebf9d7
pdf-font-stream PDF embedded font (sfnt) at offset 0x14942 18580 bytes