Malicious PDF — malware analysis report

Static analysis result for SHA-256 e5e0b12c9fc0de1f…

MALICIOUS

PDF

80.6 KB Created: 2021-09-06 15:57:55 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-16
MD5: 534347b4f2dfa525ca4c63be94d6d7fd SHA-1: 6b626fe55c2528275ff437178f06f6c79e2c69b5 SHA-256: e5e0b12c9fc0de1f00a92daaebf701e0f2a69c0b0e485aa43556f33d00af5061
164 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document exhibits characteristics of a phishing lure, as indicated by the 'SE_INVOICE_LURE' heuristic and the presence of numerous links pointing to potentially compromised websites. The ML classifier and ClamAV detection strongly suggest malicious intent, likely to download further payloads or redirect users to malicious sites. No scripts were extracted, but the structure and heuristics point towards a phishing or credential harvesting attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9975

Heuristics 7

  • 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.
  • Fake invoice / payment lure low SE_INVOICE_LURE
    Document contains invoice or payment language paired with an action verb — useful context when combined with link, macro, or attachment indicators
  • 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.mueblesgamez.com/ckfinder/userfiles/files/rinozetoxusutudi.pdf In PDF document text
    • https://useoneconvo.com/wp-content/plugins/super-forms/uploads/php/files/6608a4d5d6eeaded9e53b560a3b464f4/96166810205.pdfIn PDF document text
    • https://patriciogaete.com/upload/file/70966530368.pdfIn PDF document text
    • http://www.louthadventures.ie/wp-content/plugins/formcraft/file-upload/server/content/files/160727ff09affc---18136016489.pdfIn PDF document text
    • http://www.alfapilates.pl/upload/file/59829345338.pdfIn PDF document text
    • https://wsbtitan.com/images/file/82588281095.pdfIn PDF document text
    • https://yidinfo.net/wp-content/plugins/super-forms/uploads/php/files/lncu09uusp88a0lv0f2nhfn0p2/xaxenobit.pdfIn PDF document text
    • http://okfilm.kr/userData/board/file/61551592358.pdfIn PDF document text
    • https://saraelv.no/wp-content/plugins/formcraft/file-upload/server/content/files/16124456e79438---64265376085.pdfIn PDF document text
    • https://chrmglobal.com/userfiles/file/borofoligozokoxivosozajuf.pdfIn PDF document text
    • https://agrachoff.ru/wp-content/plugins/super-forms/uploads/php/files/897d59c2fb5707cf6f58608c96ff5c89/mewowu.pdfIn PDF document text
    • http://henrycrawfordreunion.com/clients/1/19/1929e20d1ffebcad6d8b2a659e9c170d/File/dukenoba.pdfIn PDF document text
    • https://eandjfamilyhealthcenter.com/wp-content/plugins/super-forms/uploads/php/files/f6b6cbac701eec332f15fd31d582c467/foxukafer.pdfIn PDF document text
    • http://www.jhannahs.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608988f77fe75---daxofutewan.pdfIn PDF document text
    • http://www.1000ena.com/wp-content/plugins/formcraft/file-upload/server/content/files/160795aaa54874---66027375354.pdfIn PDF document text
    • http://sowa-architekci.pl/userfiles/files/nogodisefemonubi.pdfIn PDF document text
    • http://angarakshaksecurity.com/userfiles/file/32500505896.pdfIn PDF document text
    • http://www.tobywells.org/media/fckdir/file/48622887544.pdfIn PDF document text
    • http://www.drop-lok.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607a09a0a82f0---41162947132.pdfIn PDF document text
    • http://petgears.com/app/webroot/files/file/nedidiro.pdfIn PDF document text
    • http://caydinhlang.net/userfiles/image/file/12015946469.pdfIn PDF document text
    • https://takiminsahada.com/wp-content/plugins/super-forms/uploads/php/files/4da4qbg7r3anort2s0sgo3rid2/30951740743.pdfIn PDF document text
    • http://npi-management.com/ressource/site-image/files/52858385617.pdfIn PDF document text
    • http://hmed.vn/upload/files/15145531265.pdfIn PDF document text
    • http://rsentco.com/upload/file/kanejemeb.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/ngfLrbzwjls/uplcv?utm_term=free+petition+template+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://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_off0000d80d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD80D 10468 bytes
SHA-256: 0ea4a86a8d95e09d470122e0c176a95a67e66be1a10bbcd0802c40bf036b0818
font_01_sfnt_off0000efb1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEFB1 17208 bytes
SHA-256: 82fa778ae7299c1a0d298f06d60f1421d6a03dc0f0b715e36174f9659d463b3f
font_02_sfnt_off00011c85.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11C85 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1