Malicious PDF — malware analysis report

Static analysis result for SHA-256 526db60093f647f2…

MALICIOUS

PDF

85.3 KB Created: 2021-06-25 00:34:05 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-27
MD5: be4946ff5308dc5af8f948367cf5efb5 SHA-1: a32380bbd498b86ca8303132e6a447f06b6161a8 SHA-256: 526db60093f647f2913494f770c1482a1230aad8d9379739580ecd4cba95782c
156 Risk Score

Malware Insights

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

This PDF file was flagged by multiple heuristics and an ML classifier as malicious, specifically identified as a phishing trojan by ClamAV. The document contains a link farm pointing to multiple compromised WordPress sites, suggesting an attempt to redirect users to malicious content or phishing pages. The presence of numerous external URIs and link farm indicators strongly supports a phishing or malware distribution attack pattern.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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 https://coachtourbusrental.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b8a5dbef819---71152559217.pdf In PDF document text
    • http://www.hj-bouwt.be/wp-content/plugins/formcraft/file-upload/server/content/files/160907b2882adc---69007512022.pdfIn PDF document text
    • http://yaqeen-eg.com/userfiles/file/79600917853.pdfIn PDF document text
    • http://stopasbestos.ca/wp-content/plugins/formcraft/file-upload/server/content/files/16092dbfde4aad---79257501750.pdfIn PDF document text
    • http://sl-light.ru/design/img/upload/file/lenekigidatufuraviwafu.pdfIn PDF document text
    • https://thepetrichortouch.com/wp-content/plugins/super-forms/uploads/php/files/o4gnu3jqqaqnjl03naoa78v38k/suziwimiko.pdfIn PDF document text
    • https://cbolean.com/wp-content/plugins/super-forms/uploads/php/files/97gg6pbc9d8rpg4si9ee4j8hq0/vobobe.pdfIn PDF document text
    • https://pabausa.org/wp-content/plugins/formcraft/file-upload/server/content/files/160bb11031aaa3---witorarimu.pdfIn PDF document text
    • http://kentcliffordreunion.com/clients/a/aa/aa84b18e55fac3ff3c25336c5005d9e5/File/lelare.pdfIn PDF document text
    • http://allegroescrow.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607be5c6cf92e---38282670387.pdfIn PDF document text
    • http://ecohost.ru/pics/images/file/43149054498.pdfIn PDF document text
    • https://agrotehholding.ru/wp-content/plugins/super-forms/uploads/php/files/0fd48050cf5819539ec9358fb71d6e62/71398935519.pdfIn PDF document text
    • http://xn--80ab1a9a.xn--p1ai/sadm_files/lajofofezotixejowolazagov.pdfIn PDF document text
    • https://mimpishio2bet.com/contents//files/kuzameparodomoguluk.pdfIn PDF document text
    • http://www.maoles.com/wp-content/plugins/formcraft/file-upload/server/content/files/16082fa4721ee2---pelun.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/1KS0DP0cxss/uplcv?utm_term=ratheeb+haddad+pdfPDF 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://scripts.sil.org/OFLIn 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_off0000eed0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEED0 4972 bytes
SHA-256: a5caa9c85670bbd6facafd62ebf0f794011fcfdf8a02bb6819374a2b9c029c6f
font_01_sfnt_off0000ffbb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFFBB 13048 bytes
SHA-256: d5f8d6135c9c3490d920ad1bf56d025e83c9c140efe87c38eebfb258918843e7
font_02_sfnt_off000129ea.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x129EA 18408 bytes
SHA-256: 35ba81e12b9ff6646cfe6c771f0f05beb5818e2f5d31faab98e38bc541af7e25