Malicious PDF — malware analysis report

Static analysis result for SHA-256 0a62d08a2d42fffe…

MALICIOUS

PDF

93.5 KB Created: 2021-06-28 21:51:40 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: d0dc7e4d8599eef1cad34b9570759381 SHA-1: b3e204142a1e5df9bb3fbab504c6f67a0bf251fe SHA-256: 0a62d08a2d42fffe8175212d74b7683e1781a2013c637b57cbd8b307be86b4ab
156 Risk Score

Malware Insights

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

The PDF was flagged by multiple heuristics as malicious, including a high-confidence ML classifier and ClamAV detection. It contains numerous links, many pointing to compromised WordPress sites, indicating a link farm designed to redirect users to potentially malicious content. The presence of embedded URLs and the overall structure suggest an attempt to exploit users through deceptive links, likely for phishing or malware delivery.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9942

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://sinara.org.br/wp-content/plugins/formcraft/file-upload/server/content/files/160ab8bbb39f57---41239068423.pdf
    • http://fcv-bo.org/data/fcv-bo/userfiles/file/nitejonexosigonew.pdf
    • https://gbagencement.fr/uploads/file/18399179743.pdf
    • https://spencershaulageltd.co.uk/wp-content/plugins/super-forms/uploads/php/files/b4e766a8b1752cc53f104c086cfc6850/gevupijonamidotoxafar.pdf
    • https://soba05.org/wp-content/plugins/super-forms/uploads/php/files/12fa1da4e4ee880d0d9bad19e9888712/basanazopij.pdf
    • https://www.reachcast.ca/wp-content/plugins/super-forms/uploads/php/files/f50ff80b17caef4591ee27da609cd641/kexigujogamaxuzatowemipat.pdf
    • https://www.vigo.co.za/wp-content/plugins/formcraft/file-upload/server/content/files/160a48aa316a6b---96988313620.pdf
    • https://petroblend.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609c07db969ad---92329884425.pdf
    • https://quickonboarding.com/wp-content/plugins/super-forms/uploads/php/files/4b706a383a29375fe08b2edf5f9fc423/44120487540.pdf
    • https://malimbe.africa/wp-content/plugins/super-forms/uploads/php/files/cd0a2d12c18167359eee5367b0db035f/32699715455.pdf
    • http://www.fsnn.se/wp-content/plugins/formcraft/file-upload/server/content/files/160a52f9d4c37b---75868875987.pdf
    • https://baodinhsolar.com/wp-content/plugins/super-forms/uploads/php/files/9mh2o284k6c366a4apnhouuk1c/51196326077.pdf
    • http://rayanchem.com/d/files/47101305844.pdf
    • https://abugfreemind.com/userfiles/file/nofawezisexofelu.pdf
    • http://www.vivelamusica.es/wp-content/plugins/formcraft/file-upload/server/content/files/160a8e4a42f351---67161789490.pdf
    • http://www.ebsjosepirosamaria.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c156a7383e1---revubelosufinariteso.pdf
    • http://erbamedica.org/userfiles/files/14521772081.pdf
    • https://amalighting.com/wp-content/plugins/super-forms/uploads/php/files/d489eab711cc138b4723df30b00e1814/zajitimimutuxumofisa.pdf
    • https://lawina-radom.pl/files/file/55757334914.pdf
    • https://signaturetowerpune.com/wp-content/plugins/super-forms/uploads/php/files/ehni276s9903sfl3jqpg2ue243/646311400.pdf
    • https://123kozijnofferte.nl/wp-content/plugins/super-forms/uploads/php/files/0lo0gvdqrqdocrk363tog03ri0/10074326729.pdf
    • https://weblative.com/wp-content/plugins/super-forms/uploads/php/files/949lm1ld1172sv9aablhp4ohbt/58387990706.pdf
    • http://vishalaholidays.com/ckfinder/userfiles/files/37347060771.pdf
    • https://feedproxy.google.com/~r/skout/mBVl/~3/GLLx1DTH0VQ/uplcv?utm_term=negligence+in+criminal+law
    • 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_off00010ea2.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0x10EA2 16792 bytes
font_01_sfnt_off000126b4.bin
54d68b453ba115318643060c11315af95a01297d88f8e5cf734a38e643066524
pdf-font-stream PDF embedded font (sfnt) at offset 0x126B4 16600 bytes
font_02_sfnt_off000151eb.bin
b4608294d68457ed9a49fc3d1548610923802f9142625aa52e70c4f6145a3d3a
pdf-font-stream PDF embedded font (sfnt) at offset 0x151EB 10248 bytes