Malicious PDF — malware analysis report

Static analysis result for SHA-256 f187c9e42e00ae56…

MALICIOUS

PDF

95.9 KB Created: 2021-07-13 15:30:05 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-26
MD5: db5cf2cc8b85c42eafbe8f13a2475be8 SHA-1: 3d02d31e4df6674084b905276a1eaeae6272c3f1 SHA-256: f187c9e42e00ae56795807d8177f9f3ee17f32e97243ad15a64d48324c14a515
156 Risk Score

Malware Insights

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

The PDF contains a large number of embedded URLs, many of which point to compromised WordPress upload directories or disposable hosting, indicating a link farm designed to distribute malicious content or phish users. The ML classifier and ClamAV detection strongly suggest malicious intent, likely related to 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://findmealocalpainter.com/insurazon/admin/userfiles/file/19184183178.pdf In PDF document text
    • http://com123.vn/uploads/file/gevorifo.pdfIn PDF document text
    • http://andreevmag.com/wp-content/plugins/super-forms/uploads/php/files/88b9a3202345014fd77dbf0a19e9a35e/29813431043.pdfIn PDF document text
    • http://btc-ltd.com/upload/file/tejugamatasapijivomebunef.pdfIn PDF document text
    • http://bouncebodysupplements.com/newerac2c/userfiles/file/fipoxobowok.pdfIn PDF document text
    • https://wentworthre.com/wp-content/plugins/super-forms/uploads/php/files/7a617dd71bf6857ae058b07f8631b157/62864227865.pdfIn PDF document text
    • https://ethiquedevelopers.com/wp-content/plugins/super-forms/uploads/php/files/14f92baf6ca75d2fcbc382d372c9a849/lexoniwomoraret.pdfIn PDF document text
    • https://www.saenger-ohg.de/wp-content/plugins/formcraft/file-upload/server/content/files/1608989f0a2ee5---48621672340.pdfIn PDF document text
    • https://gyandeepjkss.org/userfiles/file/64102002731.pdfIn PDF document text
    • https://gretajensen.com/ckfinder/userfiles/files/98557373578.pdfIn PDF document text
    • http://nuyewpilot.academy/wp-content/plugins/super-forms/uploads/php/files/427a9ee4d8a872d29bf4bca7d8fa24b8/vedofalaxi.pdfIn PDF document text
    • http://wakingbeauty.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c0083b819be---39950422723.pdfIn PDF document text
    • http://domainecomps.com/documents/files/5501054291.pdfIn PDF document text
    • http://iideree.org/wp-content/plugins/formcraft/file-upload/server/content/files/160b59f9a72a2d---lavifevadela.pdfIn PDF document text
    • https://greshamgilessalon.com/wp-content/plugins/super-forms/uploads/php/files/0189a56aa077555549fd613583d6e7be/1214923683.pdfIn PDF document text
    • http://parejalecaros.com/adjunto/upload/fck/files/zifatixa.pdfIn PDF document text
    • https://carea2plus.com/wp-content/plugins/super-forms/uploads/php/files/e12251ad5dedcccf19e00d4b48b0ef25/69394679180.pdfIn PDF document text
    • http://kolasinprevoz.rs/slike/files/51381316813.pdfIn PDF document text
    • http://electrogalicia.com/electrogalicia/recursos/archivos/xerusasetakale.pdfIn PDF document text
    • https://uppersanduskyrotary.com/cms/files/File/52158784300.pdfIn PDF document text
    • https://www.fecomerciomg.org.br/wp-content/plugins/formcraft/file-upload/server/content/files/160a8754d3c8c2---33324468057.pdfIn PDF document text
    • https://www.zulilighting.com/wp-content/plugins/super-forms/uploads/php/files/1fc3394fcce1912f9fcc518ff7ba7010/wusozuriwinokabusijusosas.pdfIn PDF document text
    • https://mobistore.co.nz/wp-content/plugins/super-forms/uploads/php/files/f2d1fe050ac6def28d74778818c4c941/pomog.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/ngfLrbzwjls/uplcv?utm_term=nutrition+label+assignmentPDF 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_off00011314.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11314 10668 bytes
SHA-256: 5f539576ca487053eaf03be6c92091bcdaea4b08de67ed6ebeb79fb1e80b2c0a
font_01_sfnt_off00012b81.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12B81 17704 bytes
SHA-256: 9499f87ec72cdbe944ab10874c36993a2396c42ae0eea8f39c83c6daab0832b9
font_02_sfnt_off00015a59.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x15A59 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1