Malicious PDF — malware analysis report

Static analysis result for SHA-256 07f17c030e79dbbb…

MALICIOUS

PDF

81.5 KB Created: 2021-09-19 18:16:29 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-16
MD5: d44158781d1925c88ba07fd9a202add7 SHA-1: 632d7fcbdbc5388917c1b7eb6af5ace3d8271b52 SHA-256: 07f17c030e79dbbb7414cc38acb672e5e78d572aba50da19bf34b0ea9efc50ac
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 a machine learning classifier as malicious, with ClamAV identifying it as a phishing trojan. It contains numerous links, many pointing to compromised WordPress upload directories and disposable hosting, suggesting a link farm designed to redirect users to malicious sites. The presence of external URIs and link farms indicates an attempt to lead the user away from the document to a potentially harmful destination.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9977

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://huntic.ru/uplcv?utm_term=expo+android+emulator+windows+10 PDF link annotation
    • http://rrmkaryacollege.org/rrmkarya/userfiles/file/90201079988.pdfIn PDF document text
    • http://labradory.pl/file/31827934935.pdfIn PDF document text
    • https://www.aledrukujemy.pl/ckfinder/userfiles/files/38384390824.pdfIn PDF document text
    • https://ardiinerkh.mn/uploads/userfiles/files/bofatosiz.pdfIn PDF document text
    • https://tomorrowhubs.com/upload/users/files/tolodolonudetej.pdfIn PDF document text
    • http://szilasfood.hu/pic_upload/files/fojisodav.pdfIn PDF document text
    • https://gtsonline.nl/wp-content/plugins/super-forms/uploads/php/files/je1fhch79lq6bvi606mvn7rae4/48459571950.pdfIn PDF document text
    • https://comesa.com.pe/wp-content/plugins/super-forms/uploads/php/files/9c1ac76f49d5980851a49212745e7661/jerosuwokigesigozuxab.pdfIn PDF document text
    • https://rebates.forex/wp-content/plugins/super-forms/uploads/php/files/ut7k38e0ruopf2adh5oai0h592/neduwewagugidimuresuxur.pdfIn PDF document text
    • http://racecross.com/upload/edito_fckeditor/file/ladiluterol.pdfIn PDF document text
    • http://pocatellocampfire.com/wp-content/plugins/super-forms/uploads/php/files/kmthl4t09n3n36m3sun2b32mqf/buzajovojibunulamil.pdfIn PDF document text
    • http://bakefruit.com/uploads/files/202109051549469917.pdfIn PDF document text
    • https://oneremote.ru/wp-content/plugins/super-forms/uploads/php/files/8fb6939658646e190dca15b6223fc641/teromub.pdfIn PDF document text
    • https://www.emmabowman.com/wp-content/plugins/super-forms/uploads/php/files/2b01a1c4bc3945cf3f1d4f66505cc151/88794744006.pdfIn PDF document text
    • http://veronicanealhome.com/wp-content/plugins/formcraft/file-upload/server/content/files/2/16139182bd04ef---21184065546.pdfIn PDF document text
    • http://bisenzia.it/userfiles/files/wusabuva.pdfIn PDF document text
    • https://tucsonhomewindowtint.com/wp-content/plugins/super-forms/uploads/php/files/7c830222e8e7d8260e2c2ffc5a3517c3/nojidenuzumifarufokomeboj.pdfIn PDF document text
    • http://noithatphathuy.com/Images_upload/files/71502786795.pdfIn PDF document text
    • http://tauben-buchmeier.de/kleinberliner-schuetzen/userfiles/files/69135006647.pdfIn PDF document text
    • http://stnicholasway.com/userfiles/file/wewiwuxisiboge.pdfIn PDF document text
    • https://clap-bas.com/userfiles/file/75685589691.pdfIn PDF document text
    • http://xn--90afqerdlt1f.xn--p1ai/admin/ckfinder/userfiles/files/tugolazujoxuberovivak.pdfIn PDF document text
    • http://brbud.pl/userfiles/file/19743987850.pdfIn PDF document text
    • 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_off0000d868.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD868 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000f07f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF07F 11000 bytes
SHA-256: bff46662783cfe2670c9211b1fff98f6038d370d67861c3d843b89988be455a9
font_02_sfnt_off00010a1c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10A1C 17692 bytes
SHA-256: 7842ed7542c080b2f718c68e106af52febcd28c550bd870228671320738f3395

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