Malicious PDF — malware analysis report

Static analysis result for SHA-256 3d172820494432f3…

MALICIOUS

PDF

71.4 KB Created: 2021-09-12 01:17:30 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-16
MD5: b61687467314affffb0faa41ffb03d3f SHA-1: ae93ab5c7e222df678a2d60e3d0ee48542b5be2c SHA-256: 3d172820494432f330c63a9feb54d8cca25d5b2d2e0a246e7668b4c8109b81de
156 Risk Score

Malware Insights

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

The PDF file was flagged by ClamAV as Pdf.Phishing.Trojan and an ML classifier indicated a high probability of maliciousness. Heuristics reveal the document contains a link farm pointing to compromised WordPress upload storage, suggesting a phishing or malware distribution attempt. The embedded URLs are designed to redirect users to potentially malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9975

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://irlanc.ru/uplcv?utm_term=conversation+casanova+pdf PDF link annotation
    • http://iamsoldierfit.com/wp-content/plugins/formcraft/file-upload/server/content/files/16132be0eb2cc1---xadowuxobeturerorep.pdfIn PDF document text
    • https://bak.vn/upload/files/nabis.pdfIn PDF document text
    • https://jackinthegym.com/uploads/files/202109090705032377.pdfIn PDF document text
    • http://pinzimoniofiumicino.eu/userfiles/files/fonezivegikamidibubadex.pdfIn PDF document text
    • https://hydratrend.com/application/third_party/ckfinder/userfiles/files/27555538177.pdfIn PDF document text
    • https://knoxvilleremembers.com/media/95568416114.pdfIn PDF document text
    • https://riosemarescentrodemergulho.com/ckfinder/files/20314485019.pdfIn PDF document text
    • https://www.inkfactory.pk/wp-content/plugins/formcraft/file-upload/server/content/files/1613bafb3da9f5---romokoxojigagab.pdfIn PDF document text
    • http://vntattoosupply.net/uploads/image/files/zeritewekovutevawofizus.pdfIn PDF document text
    • http://hugslock.com/app/webroot/img/files/sanolomerawumipelaludodu.pdfIn PDF document text
    • http://grgct.com/ckfinder/userfiles/files/nirux.pdfIn PDF document text
    • http://le-bouquet.be/userfiles/files/86904539998.pdfIn PDF document text
    • http://www.offshoreyachts.net/web_upload/editor/files/zoxonabuninu.pdfIn PDF document text
    • https://tradingphrases.com/userfiles/files/rorisawugepozujezat.pdfIn PDF document text
    • http://turinhotelcompany.com/userfiles/files/roziwegupisebuwoloz.pdfIn PDF document text
    • http://videoacceso.com/wp-content/plugins/formcraft/file-upload/server/content/files/161308ab221a81---97249024630.pdfIn PDF document text
    • http://dj-maily.com/uploads/pages/files/5024949129.pdfIn PDF document text
    • https://mytutr.com/wp-content/plugins/super-forms/uploads/php/files/ea6b35abfef826ef749baa4b04fa2eec/sozobazegirofutanuda.pdfIn PDF document text
    • http://nek.ua/wp-content/plugins/formcraft/file-upload/server/content/files/1613a4e14afa50---feruwifuso.pdfIn PDF document text
    • http://headlinesdinerla.com/uploads/files/vemivevaxekox.pdfIn PDF document text
    • http://synowka.pl/galeria/file/53265260666.pdfIn PDF document text
    • http://proxima-design.cz/files/file/peruna.pdfIn PDF document text
    • https://zifu-tech.com/app/webroot/userfiles/files/fozagozatuvunilabima.pdfIn PDF document text
    • https://masihpt2.com/contents/files/biroduzalituribi.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_off0000b91b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB91B 15128 bytes
SHA-256: d7aea934362b35e16e584011a81b38cdf94afb2146b9b4bcd673e8be7934b030
font_01_sfnt_off0000df07.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDF07 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off0000f71e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF71E 10664 bytes
SHA-256: 28359dece28c8c6d5f68eabfb6167917f1779dede1e89fd6f294a5ec8e591815

Open this report in the interactive analyzer, or submit your own file for analysis.