Malicious PDF — malware analysis report

Static analysis result for SHA-256 f38cd6e8a47482d7…

MALICIOUS

PDF

94.9 KB Created: 2021-09-05 21:33:17 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-27
MD5: 9f626fa0aafbcc869b56b5f16677827e SHA-1: dbac5fae2f36b8ba1a047e5eea6f833584404f67 SHA-256: f38cd6e8a47482d758c3293fb5816e07cd0cdddc5f1a5aa2410e2621e1a3907e
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF was flagged by ML classifiers and ClamAV as malicious, specifically as a phishing trojan. It contains numerous embedded URLs, many of which point to compromised WordPress sites or disposable hosting, suggesting a link farm designed to redirect users to malicious content. No scripts were extracted, but the structure and URL patterns are indicative of a phishing or malware distribution lure.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9969

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://sciencevier.com/wp-content/plugins/formcraft/file-upload/server/content/files/16072adba83e46---satetewa.pdf In PDF document text
    • https://mbamantra.com/ci/userfiles/files/wawebevi.pdfIn PDF document text
    • http://alphabodysupplements.com/newerac2c/userfiles/file/9620450553.pdfIn PDF document text
    • http://lica-mpt.it/userfiles/files/37119330891.pdfIn PDF document text
    • https://alcc.vn/wp-content/plugins/super-forms/uploads/php/files/upuf1ddrvar1mt5gbv53i04pmo/jadudi.pdfIn PDF document text
    • http://2girlstrippin.com/wp-content/plugins/formcraft/file-upload/server/content/files/160df073554e0b---rexoxefawu.pdfIn PDF document text
    • http://www.allatpatikapecs.hu/images/file/damelatifota.pdfIn PDF document text
    • https://vernadoc.com/wp-content/plugins/super-forms/uploads/php/files/f473bc78bb615fd3ae4cdc18b268fcef/30149366722.pdfIn PDF document text
    • http://homespakistan.net/magzine/uploadfiles/file/nozotidexigisotozewet.pdfIn PDF document text
    • https://shinyjewellers.com/wp-content/plugins/super-forms/uploads/php/files/pocu57k4s3qjtjbrtsgk9kjggp/zugogaxoja.pdfIn PDF document text
    • http://www.naturapreserved.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608dfd0be7153---puwix.pdfIn PDF document text
    • http://susanjeske.com/clients/82887/File/83714114843.pdfIn PDF document text
    • https://aglogistics-bo.net/userfiles/file/nasixizulosufovelipe.pdfIn PDF document text
    • http://newo.ru/files/files/torojege.pdfIn PDF document text
    • https://sportli.co.il/wp-content/plugins/formcraft/file-upload/server/content/files/160b8a11d55762---84816888359.pdfIn PDF document text
    • https://www.fifatravels.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a1ab052a3e9---fukimebabigix.pdfIn PDF document text
    • https://yifff.se/userfiles/file/kasafer.pdfIn PDF document text
    • https://xn--64-mlcufjjaii0l.xn--p1ai/wp-content/plugins/super-forms/uploads/php/files/75ae8d3d39153c6f500473c42b0359a7/bijekarupadikez.pdfIn PDF document text
    • https://newat.ru/wp-content/plugins/super-forms/uploads/php/files/29a7619bb83803e6c866a41eddd13e1e/22541867958.pdfIn PDF document text
    • https://autoskola-scp.com/files/fajusazodu.pdfIn PDF document text
    • http://emilybarnes.com/DEVELOPMENT/VERSIONED/emilybarnes/trunk/sites/default/files/file/relaki.pdfIn PDF document text
    • https://ipekyolumedya.com/resim_galeri/file/12260766398.pdfIn PDF document text
    • http://www.fullmooneye.com/wp-content/plugins/formcraft/file-upload/server/content/files/160808d5d95f69---68212628299.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/S30rS-6n6vg/uplcv?utm_term=patologia+tiroidea+y+embarazo+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_off00010e91.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10E91 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off000126a8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x126A8 10884 bytes
SHA-256: b8965aecb2d7d6f6dd93aff34b78acc52e5ad1476ac4ab81d4ec139447def228
font_02_sfnt_off00013f75.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13F75 18252 bytes
SHA-256: 85dd0c6a733b94c2c7093b8f4d4d444617c41158efaea1f9ee634a682ab1e36d

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