Malicious PDF — malware analysis report

Static analysis result for SHA-256 e76995502aee0d89…

MALICIOUS

PDF

87.9 KB Created: 2021-09-01 09:11:59 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-12
MD5: 32fd3d5aff47a86d70a67c56ce68bdfe SHA-1: 0d1dc20d483220e38fb71e3c21554bd6eee61b29 SHA-256: e76995502aee0d898e4e97d5dc16f7a0357cf6b2d9ed3c2770a264a4a5b1cd52
164 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file was flagged by multiple heuristics as malicious, including a high-confidence ML classifier and ClamAV detection. It contains a link farm pointing to numerous compromised WordPress sites, suggesting an attempt to distribute malicious content or phish users. The presence of external URIs and the nature of the link farm indicate a likely spearphishing attachment attack vector.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9994

Heuristics 7

  • 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.
  • Urgency / deadline lure low SE_URGENCY_LURE
    Document contains urgency or deadline language ('account will be terminated', 'action required within 24 hours', etc.) — useful context, but low-signal without other findings
  • 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 https://huntic.ru/uplcv?utm_term=tell+me+about+yourself+answer+with+example PDF link annotation
    • http://vtracauto.com/wp-content/plugins/formcraft/file-upload/server/content/files/160cdf6bfc1429---dutigawirekunakofaka.pdfIn PDF document text
    • https://www.nobleorthodontic.com/wp-content/plugins/super-forms/uploads/php/files/ad0214c2653cd53ec507fb443a83ba40/97254700186.pdfIn PDF document text
    • http://becro-plast.hr/wp-content/plugins/formcraft/file-upload/server/content/files/1608380abc93d9---40305311214.pdfIn PDF document text
    • http://countrysquirefoods.com/wp-content/plugins/formcraft/file-upload/server/content/files/160afe384d1e3b---76438443913.pdfIn PDF document text
    • https://www.wflorlando.com/wp-content/plugins/super-forms/uploads/php/files/8b1c6e856d83d30ad13c562330910586/dawosupazinelo.pdfIn PDF document text
    • https://xn--1--8kcai1ck2bs.xn--p1ai/wp-content/plugins/super-forms/uploads/php/files/93619e6500249c78ac698a9d9e39fb10/pevibikarodita.pdfIn PDF document text
    • https://peterdegendt.be/file/gilizekofesum.pdfIn PDF document text
    • http://incomingmakedonia.com/files/files/gubilowaja.pdfIn PDF document text
    • https://mpressivelabels.com.au/application/third_party/ckfinder/userfiles/files/3528649201.pdfIn PDF document text
    • https://hfdjet.com/wp-content/plugins/super-forms/uploads/php/files/f7e4e00bc5c7fa618a2c7ea30459c39c/wakalajusam.pdfIn PDF document text
    • http://nadiadsa.org/userfiles/file/77987305733.pdfIn PDF document text
    • https://sancarspune.com/wp-content/plugins/super-forms/uploads/php/files/7bce35ad7aa193b448a7c9bc1a6002fd/koxis.pdfIn PDF document text
    • http://3q1p.com/upload/file/210901054928918252lp0trki0gfip.pdfIn PDF document text
    • https://www.sir.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/1609de5e1aa739---57610001778.pdfIn PDF document text
    • https://chocoinmobiliario.com/wp-content/plugins/super-forms/uploads/php/files/3e876fdac93c13fe0cc0556c7a47b47a/mirulaka.pdfIn PDF document text
    • http://noithatnhapkhaugiasi.com/luutru/files/rutoduzuvama.pdfIn PDF document text
    • http://www.northeastmarquees.com/wp-content/plugins/super-forms/uploads/php/files/0d66f4486c1160fa7a8889d4e019d73a/dokuwakumolonoroto.pdfIn PDF document text
    • http://asahiru-ban.com/files/files/rexolanobani.pdfIn PDF document text
    • http://bjsprt.com/uploadfile/file///2021060414411028.pdfIn PDF document text
    • https://euforbiabulgaria.com/uploads/pages/files/93399032986.pdfIn PDF document text
    • http://bafiti.com/sklep/userfiles/file/93895151181.pdfIn PDF document text
    • http://akwarella.pl/user_uploads/file/loxodajatejewoxerubukimop.pdfIn PDF document text
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#In PDF document text
    • http://purl.org/dc/elements/1.1/In PDF document text
    • http://ns.adobe.com/pdf/1.3/In PDF document text
    • http://ns.adobe.com/xap/1.0/In PDF document text
    • http://ns.adobe.com/xap/1.0/mm/In PDF document text
    • http://ns.adobe.com/xap/1.0/rights/In PDF document text
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000f09e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF09E 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off000108b0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x108B0 18052 bytes
SHA-256: a1e7aa95909f801be95d1671e8d940a32f20b8cae248077d8d4e5605ac25770a
font_02_sfnt_off000137aa.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x137AA 11128 bytes
SHA-256: 2a33991f932f5caf953768e601fd72f10b8dc46620c7333f54cc64362d951f91

Open this report in the interactive analyzer, or submit your own file for analysis.