Malicious PDF — malware analysis report

Static analysis result for SHA-256 05d5ed69c162bfc1…

MALICIOUS

PDF

87.8 KB Created: 2021-07-16 08:19:04 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-09-14
MD5: 32f5c810e71c8a9b7da58aeb9f4453ce SHA-1: b5865e59e7073dda3e00c8878be3c355e408f2d3 SHA-256: 05d5ed69c162bfc1af7716a8615ef47854aaa488b2999d0afb0dbe935b32a7d0
156 Risk Score

Malware Insights

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

The PDF was flagged by ClamAV as Pdf.Phishing.Trojan and a machine learning classifier indicated a high probability of maliciousness. Heuristics identified the document as a link farm pointing to compromised WordPress upload storage and disposable hosting, suggesting an attempt to distribute malicious content or phish users. No scripts were extracted, but the structure and URL patterns are indicative of a phishing or malware distribution campaign.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9991

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://richfield1962.com/clients/4/47/47516dc9824f3897220912ef171c404f/File/fadorusutulitan.pdf In PDF document text
    • http://www.radiopopiatej.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a2fbb1b4685---boxireguvavavuzekif.pdfIn PDF document text
    • https://bowenpainter.com/wp-content/plugins/formcraft/file-upload/server/content/files/160ce45623b204---73702962247.pdfIn PDF document text
    • https://camile.vn/wp-content/plugins/super-forms/uploads/php/files/ohst1a1sp6iahrmv9u6h3gns4m/rabolajosonapokezuv.pdfIn PDF document text
    • https://kakvkusno26.ru/wp-content/plugins/super-forms/uploads/php/files/4e5a0c141a76b1c260e08071f4154cd9/ludon.pdfIn PDF document text
    • http://lorichphoto.com/pictures/file/77431752139.pdfIn PDF document text
    • https://novahealthclinic.ca/userfiles/file/pofenomovaxabekuvabolurum.pdfIn PDF document text
    • https://pioneerlift.com/upfiles/editor/files/pupugowepiporozibevomumuk.pdfIn PDF document text
    • https://israelonthehouse.com/wp-content/plugins/formcraft/file-upload/server/content/files/16082baf60b0d1---9084970317.pdfIn PDF document text
    • https://bandai-k.com/userfiles/file/30251975377.pdfIn PDF document text
    • http://hondatayho.vn/images/ckeditor/files/wutesegamid.pdfIn PDF document text
    • http://aaexpansionjoint.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a6249f82e50---93145765558.pdfIn PDF document text
    • https://bohemiamaestro.com/webpagebuilder/ckfinder/userfiles/files/pigemafunigala.pdfIn PDF document text
    • https://micast.de/wp-content/plugins/super-forms/uploads/php/files/3dgivp1119d1nb927mcfji8suk/50527941029.pdfIn PDF document text
    • https://medicentrumnz.eu/medicentrum/files/file/gimiduda.pdfIn PDF document text
    • http://akcjonariusz.com/UserFiles/file/91666059788.pdfIn PDF document text
    • https://feniks9.ru/ckfinder/userfiles/files/87653020294.pdfIn PDF document text
    • https://n-v-v.dk/userfiles/file/29619074474.pdfIn PDF document text
    • http://adamlegal.com/userfiles/file/52987936477.pdfIn PDF document text
    • https://www.hdontheroadnapoli.it/wp-content/plugins/formcraft/file-upload/server/content/files/16092cdf3eca4e---33376726637.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/A3Ryygt5BCM/uplcv?utm_term=city+of+jackson+fire+departmentPDF 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_off0000f301.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF301 11100 bytes
SHA-256: 4afa0953ffee363259a8e87af493dcb6cbe58c17e1c46468805f313d33ecfb60
font_01_sfnt_off00010cf2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10CF2 17280 bytes
SHA-256: bd1f84cbdb18319c54df73b8e0b7c2cb2226339940e1b41fed82fd6c42be8a0f
font_02_sfnt_off00013a15.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13A15 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1