Malicious PDF — malware analysis report

Static analysis result for SHA-256 30106bdcb846fa0d…

MALICIOUS

PDF

80.9 KB Created: 2021-08-25 12:03:53 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 07bfef09ae79ca7da1ad04ecf0af85a4 SHA-1: b49764c319c4f59e06a7e7717b1c5ad1c3f70cde SHA-256: 30106bdcb846fa0dc5823f79ee12b5defc97f3570e3af80db3c57c8553109eba
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

The PDF contains a link farm pointing to multiple compromised WordPress upload directories and disposable hosting sites, indicating a likely attempt to distribute malicious content or phish users. The ML classifier and ClamAV detection strongly support its malicious nature. No scripts were extracted, but the structure suggests it's designed to exploit users via redirection.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9846

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
  • 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://palazzodiaz.com/userfiles/files/wegezojevoledulo.pdf
    • https://bya-ingenieria.com/ckfinder/userfiles/files/vewisokojipozixodi.pdf
    • https://bestmiamiturf.com/wp-content/plugins/super-forms/uploads/php/files/5047f24fea250917f319d014ab85e40e/pinakaramuliniduxutewatu.pdf
    • https://razdolle.by/wp-content/plugins/super-forms/uploads/php/files/6hft931epgdns0k8eqi1qpcti3/92019078314.pdf
    • https://forumhotel.by/wp-content/plugins/super-forms/uploads/php/files/0h44jhp9e6lrmhoclssstjpub1/8303432350.pdf
    • http://www.asejnrtigers.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/160af6a7d79d7e---19873898161.pdf
    • http://ferrogep99.hu/static/media/file/72888221449.pdf
    • http://curtisfamilyfun.net/clients/e/e0/e02f67ab5b6879a7eb6c21a3163f7106/File/kexatepigizaginak.pdf
    • http://orkoien.com/userfiles/files/77336096894.pdf
    • http://www.timtransportes.com/home/wp-content/plugins/formcraft/file-upload/server/content/files/16083503e7f6d0---xezunezakuzefaramivemugu.pdf
    • http://theopenhouseclub.com/wp-content/plugins/super-forms/uploads/php/files/51e951dce1a9cc88d7effe068857575b/sireparazejo.pdf
    • http://healingpawswisconsin.org/clients/a/a9/a991db820639e3552774ed9a746c1e3b/File/11769850111.pdf
    • https://winston-woodward.com/wp-content/plugins/super-forms/uploads/php/files/eaf3fbd43bcb71715fd87b9cb282202e/35213388536.pdf
    • http://www.patricktennis.nl/wp-content/plugins/formcraft/file-upload/server/content/files/16095bb2cdb652---bozefutezokaxukoxif.pdf
    • http://zerosquareonline.com/file/78046698180.pdf
    • http://pieseclimaauto.com/files/file/zosekexijimogomidov.pdf
    • https://floorco.allianceflooring.net/wp-content/plugins/super-forms/uploads/php/files/f58521184b117d6ba55b997e63b9b13f/dijixojarati.pdf
    • http://dodici12.ru/wp-content/plugins/super-forms/uploads/php/files/q1u5f1gtfs2n8tlglrcvlr38i5/lumuxuvi.pdf
    • http://nage-z.com/ckfinder/userfiles/files/30942619319.pdf
    • http://automsystem.com/UploadFile/file/20210629022335764.pdf
    • https://lashmakerpro.it/wp-content/plugins/super-forms/uploads/php/files/mdboi76l8hcttf02f6svpiqac1/91692995241.pdf
    • http://thegroverestaurantnj.com/userfiles/files/faxoderubenuzuvudawawu.pdf
    • http://amwordpress.org/wp-content/plugins/formcraft/file-upload/server/content/files/160cd3f03d0b83---69487044470.pdf
    • http://pagyesa.org/userfiles/file/20210807001222.pdf
    • https://oklogistic.lv/upload/file/zemapovevobesiwi.pdf
    • https://mattress-leader.com/media/zezuzesezufixonafetawis.pdf
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/BvfzZFkJO3s/uplcv?utm_term=different+color+flowers+animal+crossing
    • 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_off0000db01.bin
428d21771cd52955cee3ef2053eea974ad1c6eb92d2abca104e3a2867dcd98ec
pdf-font-stream PDF embedded font (sfnt) at offset 0xDB01 10764 bytes
font_01_sfnt_off0000f3e0.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0xF3E0 16792 bytes
font_02_sfnt_off00010bf2.bin
8e8afae0202a953d86e9b0a5228a29541ed9da3fa78659eec501b5326a3af872
pdf-font-stream PDF embedded font (sfnt) at offset 0x10BF2 16204 bytes