Malicious PDF — malware analysis report

Static analysis result for SHA-256 1eacdb32a006c39d…

MALICIOUS

PDF

102.7 KB Created: 2021-07-22 23:14:47 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-16
MD5: 168aa4308fe9b0601ef07d95b9d98ddf SHA-1: 44e04ffe9681782a1ba925920599b9e7e3163751 SHA-256: 1eacdb32a006c39db0ac74331a1cd240d6696e254a057f61233a3b54f3de8f76
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF file was flagged by ClamAV as Pdf.Phishing.Trojan and a machine learning classifier indicated a high probability of maliciousness. Heuristics indicate the document functions as a link farm, with many external URIs pointing to compromised WordPress upload directories and disposable hosting. While no scripts were directly extracted, the nature of the link farm suggests an intent to redirect users to malicious sites for phishing or malware delivery.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9978

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.ausafrica.co.za/wp-content/plugins/formcraft/file-upload/server/content/files/16081e720dfb8c---sonimivujigarewimupurevi.pdf In PDF document text
    • http://megat.pl/uploaded/fck_files/file/92990833965.pdfIn PDF document text
    • http://panda-es.tokyo/yamituki-n/uploads/files/76397460051.pdfIn PDF document text
    • https://endoaccessories.com/wp-content/plugins/super-forms/uploads/php/files/jl6dmk2njdr7697inpu0t12jv5/60012059666.pdfIn PDF document text
    • http://graphicon.hu/wp-content/plugins/formcraft/file-upload/server/content/files/160d861286c5bd---68149093526.pdfIn PDF document text
    • https://shinyjewellers.com/wp-content/plugins/super-forms/uploads/php/files/k07bbk9u7mgq97k2c3sh7lgodd/72842672557.pdfIn PDF document text
    • https://maugli24.ru/wp-content/plugins/super-forms/uploads/php/files/bf4dfa554c6039ecc816556ceb76921e/97833763045.pdfIn PDF document text
    • https://alkalacarservice.com/public_html/userfiles/file/dijokizabi.pdfIn PDF document text
    • https://szabobuszberles.hu/files/files/zonexogoxivivodenapotaxu.pdfIn PDF document text
    • https://laihouston.com/wp-content/plugins/super-forms/uploads/php/files/6068657232660819ca87753f25b856e0/vanopipono.pdfIn PDF document text
    • https://horgaszvelem.hu/ckfinder/userfiles/files/92297932238.pdfIn PDF document text
    • http://sshs61.com/clients/6/60/60e739d5a8cf4a6710e4f064fd99417d/File/wodidosaxuvimegarunakume.pdfIn PDF document text
    • https://ohcsi.com/ckfinder/userfiles/files/94596280451.pdfIn PDF document text
    • http://manufim.co.il/wp-content/plugins/formcraft/file-upload/server/content/files/160ab7694644d5---vetebat.pdfIn PDF document text
    • http://suapaiatuipelehakefamily.com/clients/80707/File/88671656319.pdfIn PDF document text
    • https://www.newhorizonscrisiscenter.org/ckfinder/userfiles/files/buxojagawabidotutuzekeko.pdfIn PDF document text
    • http://gsoam.ge/wp-content/plugins/formcraft/file-upload/server/content/files/160a5d7b824072---sesitulol.pdfIn PDF document text
    • https://www.peeryhotel.com/wp-content/plugins/super-forms/uploads/php/files/a164d0bbed1312dc3552cb6fa62bed65/70286533147.pdfIn PDF document text
    • https://resulgame.com/calisma2/files/uploads/65576769820.pdfIn PDF document text
    • http://uro-medical.pl/zdjecia/fotki/file/kowufazofexiwi.pdfIn PDF document text
    • https://www.infrascale.com/wp-content/plugins/super-forms/uploads/php/files/2d9b12d84ec26cedb347a50b1b0d1f0e/88262887304.pdfIn PDF document text
    • http://activesolutionelectric.com/images/file/8882730451.pdfIn PDF document text
    • https://inchirierielicopter.ro/wp-content/plugins/formcraft/file-upload/server/content/files/160a1f4959eb03---kubexudamowamefugod.pdfIn PDF document text
    • http://audiencefertilization.com/fckeditor/editor/filemanager/connectors/php/userfiles/file/sesal.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/fzgW7-mxBc0/uplcv?utm_term=roger+taylor+im+in+love+with+my+carPDF link annotation
    • 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_off00012a6d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12A6D 19220 bytes
SHA-256: aec986cd02ccf0d4bcc5b40d8da9c42157378149d4e105109489704465b607b4
font_01_sfnt_off00015c3b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x15C3B 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off00017452.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x17452 10820 bytes
SHA-256: 1bb225315e8aac34f3228db3616cac3836e664de4c60202894054c5f07e4dac5