Malicious PDF — malware analysis report

Static analysis result for SHA-256 07d007ace1475405…

MALICIOUS

PDF

79.6 KB Created: 2021-09-11 03:28:47 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-12
MD5: 856669e184f3700bc38015863b8be03f SHA-1: f98edbea4f9e648cc46f34f9f3f0a2c1dfe054c5 SHA-256: 07d007ace1475405e9ff8271887975f69db74e90a37eedb14f6cc117a2f99c39
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

This PDF file was flagged by a machine learning classifier and ClamAV as malicious, specifically as a phishing trojan. It contains numerous embedded URLs that point to various domains, many of which appear to be compromised WordPress sites or disposable hosting, suggesting a link farm designed to redirect users to malicious content. The presence of these links and the overall structure indicate an attempt to lure users to external sites, likely for phishing or malware delivery.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9953

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://wastran.ru/uplcv?utm_term=no+puedo+ver+mis+fotos+en+android PDF link annotation
    • http://robertfeinberglaw.com/images/edit_images/file/1361610119.pdfIn PDF document text
    • http://besteva.com/upload/files/pagiwisivisijofetumema.pdfIn PDF document text
    • http://bluestandard.pl/ckfinder/userfiles/files/15647258714.pdfIn PDF document text
    • https://postelezmasivu-liberec.cz/ckfinder/userfiles/files/7691906464.pdfIn PDF document text
    • http://hydrem.ru/images/file/98648207820.pdfIn PDF document text
    • https://anukulagrotech.com/ci/userfiles/files/48786820.pdfIn PDF document text
    • http://hublihorse.com/uploads/userfiles/files/perulepojirafaroburavem.pdfIn PDF document text
    • http://vasilii-orlov.fun/wp-content/plugins/super-forms/uploads/php/files/7a97411466aae575f35eab04a24914bc/97255072248.pdfIn PDF document text
    • http://britishcytology.org.uk/ckfinder/userfiles/files/kumovudosavenapanolojoju.pdfIn PDF document text
    • https://olboihorgaszto.hu/editor_up2/71363271955.pdfIn PDF document text
    • http://sushi-belovo.ru/files/93321239571.pdfIn PDF document text
    • http://intechsol.kz/wp-content/plugins/formcraft/file-upload/server/content/files/1613612fb1032b---kilezafabugutasavili.pdfIn PDF document text
    • https://madspot.dk/ckfinder/userfiles/files/bimoketudajovalasida.pdfIn PDF document text
    • http://www.donboscovizag.org/images/files/satuzig.pdfIn PDF document text
    • https://3rproject.eu/ckfinder/userfiles/files/48149932629.pdfIn PDF document text
    • https://tidaksusah.com/contents/files/jadomizuzez.pdfIn PDF document text
    • http://visualpaint.com/wp-content/plugins/formcraft/file-upload/server/content/files/1612f25339f11b---73323813.pdfIn PDF document text
    • http://yishiweb.com/upfiles/files/20210907_215749.pdfIn PDF document text
    • http://prplus4u.com/ckupload/files/29842643025.pdfIn PDF document text
    • https://www.nitdgp.ac.in/uploads/userfiles/files/87842290907.pdfIn PDF document text
    • http://tnshoppingbag.com/upfiles/file/7662165811.pdfIn PDF document text
    • http://constantemails.com/userfiles/file/1631024334bovomev.pdfIn PDF document text
    • http://kaies.cn/upfiles/210911010113171870u74cn3.pdfIn PDF document text
    • http://modaxch.com/userfiles/files/madibusalab.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_off0000d1ac.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD1AC 18344 bytes
SHA-256: bd8b0aaf463ff624e183b96d414ce5a5a99b8dfef24af0de5eae26dfd2e92a6e
font_01_sfnt_off0000ffea.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFFEA 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off00011801.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11801 10756 bytes
SHA-256: 7397352a34510fa8b080002e04d4efdf78e2999370fc3c22cb0b4d960adc52be