Malicious PDF — malware analysis report

Static analysis result for SHA-256 c47c4263a5d6ec56…

MALICIOUS

PDF

73.5 KB Created: 2021-06-28 17:14:31 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 457c1c9ee1edb49ccfbca3c87b42cc40 SHA-1: 8bd6bebcbccfff9fd1b4c5707fff9b24700283a4 SHA-256: c47c4263a5d6ec566d7e90ead815178621b098f2908f6a283270300a689b16fa
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains a link farm pointing to multiple compromised WordPress sites, which is a common technique for distributing malicious files. The ML classifier and ClamAV detection strongly indicate malicious intent, likely to trick users into downloading further malware. No scripts were extracted, but the structure suggests a phishing or malware distribution lure.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9947

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://sarahscupcakery.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608e2405f2aed---xekerabugoga.pdf
    • http://terapeutickemasaze.eu/wp-content/plugins/formcraft/file-upload/server/content/files/1608a8e27df985---51926294411.pdf
    • http://angelcabrera.com/FCKfiles/file/nisipalegamo.pdf
    • http://dijladentalcenter-qa.com/userfiles/file/giparumodonebafetik.pdf
    • http://for-rent-antwerp.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c0739786751---woxuberufefotebidixuworo.pdf
    • https://daiichigroup.net/uploads/news_file/37706349897.pdf
    • https://www.straightmyteeth.eu/wp-content/plugins/super-forms/uploads/php/files/1d63679c9aa22b628de3985591da0768/86838756734.pdf
    • https://schreinerheusi.de/wp-content/plugins/formcraft/file-upload/server/content/files/1607402672fc00---duketejiwuzofesarubu.pdf
    • https://bettenbaehren.de/wp-content/plugins/formcraft/file-upload/server/content/files/160baa46eaaa5c---dibaranopadomozi.pdf
    • http://www.oknookna.pl/wp-content/plugins/formcraft/file-upload/server/content/files/160a7ab68ce2da---96828762676.pdf
    • https://ewms.vn/wp-content/plugins/super-forms/uploads/php/files/rbubuaa1t6k8iettpam1b989md/26510871488.pdf
    • https://alphacleanwashing.com/wp-content/plugins/super-forms/uploads/php/files/e45c188d17c04fd69259e06c6e3b404d/87092829868.pdf
    • http://www.jhannahs.com/wp-content/plugins/formcraft/file-upload/server/content/files/16076b5136cb6a---41684323523.pdf
    • https://srp-galabau-rostock.de/wp-content/plugins/super-forms/uploads/php/files/jma6uvt2a5nff7sk8amdegllb9/82515224460.pdf
    • http://www.kissdocs.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/1608cf1d59efce---4868965638.pdf
    • https://wurstfargo.com/wp-content/plugins/super-forms/uploads/php/files/a7a30045fb5cb3b1718a4d3dc9f50cbe/bupiramimokewalojedulov.pdf
    • https://tehnol.ru/wp-content/plugins/formcraft/file-upload/server/content/files/160c12472db0c5---rajesiroweg.pdf
    • http://emannsltd.com/userfiles/27608521737.pdf
    • https://genegurumiraclehealer.com/userfiles/file/82658576558.pdf
    • http://beiwendq.com//data/attachment/file/92065539929.pdf
    • https://www.bistro-e.com/wp-content/plugins/formcraft/file-upload/server/content/files/160726975e751e---xemabemebeja.pdf
    • https://xlspandoek.nl/userfiles/file/gadiratedodetiwomejenob.pdf
    • http://adamlegal.com/userfiles/file/mudejefazixasodovafeliba.pdf
    • https://robotics-institute.com/wp-content/plugins/super-forms/uploads/php/files/gub8qdkun3e79u3q220l2df82k/12019680694.pdf
    • http://drstevealbrecht.com/wp-content/plugins/super-forms/uploads/php/files/28c984d652653e7f563afb83c769a67e/55452542050.pdf
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/PmAiG5ZyT-k/uplcv?utm_term=download+ancient+india+by+rs+sharma
    • 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_off0000bd29.bin
0fad24c00cb54f32eaea0613bf2d4e4c3c45322def6c194138f47ab05b7aa639
pdf-font-stream PDF embedded font (sfnt) at offset 0xBD29 16228 bytes
font_01_sfnt_off0000e722.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0xE722 16792 bytes
font_02_sfnt_off0000ff39.bin
97d1c84ad13056acd8f2388072f48ef4155201ae33375dffcae076a81d1e3828
pdf-font-stream PDF embedded font (sfnt) at offset 0xFF39 10976 bytes