Malicious PDF — malware analysis report

Static analysis result for SHA-256 2a69093c0ee021ed…

MALICIOUS

PDF

83.3 KB Created: 2021-08-18 15:54:48 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-12
MD5: e79f5386a140702de9c2aa9ed91fe247 SHA-1: d3f2545d318046b48b17503f8ef9799d76beba10 SHA-256: 2a69093c0ee021ed53568d74c80983934c664445877003793911fe89ccf20254
164 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF document contains numerous external links, many hosted on compromised WordPress sites, suggesting a link farm designed to redirect users to malicious content. The presence of a 'download' lure and ClamAV detection as 'Pdf.Phishing.Trojan' strongly indicates a phishing or malware distribution attempt. While no scripts were explicitly extracted, the nature of the links and the ML classification point towards a malicious workflow.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9912

Heuristics 7

  • 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.
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • 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://nomylo.ru/uplcv?utm_term=how+to+download+gta+ppsspp PDF link annotation
    • https://wills.sg/wp-content/plugins/super-forms/uploads/php/files/64841b68766a2a54b19a430e249b0c84/panewowabebenaxomo.pdfIn PDF document text
    • http://kino-profi.com/wp-content/plugins/super-forms/uploads/php/files/8a87bfb49d0802ade87d375333e57e6e/33855308905.pdfIn PDF document text
    • https://xn-----6kcabagcgfjsxjciriy6alkh6a7aqk.xn--p1ai/wp-content/plugins/super-forms/uploads/php/files/99e39db4f4592ba787fbcdaf2a8c9d8e/kenoxu.pdfIn PDF document text
    • http://signauction.net/userfiles/file/65926609640.pdfIn PDF document text
    • http://aucoindeshalles.com/menu/file/12996959463.pdfIn PDF document text
    • http://abapaposentados.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/160b6fc4fd44cf---numivifopofanududifebez.pdfIn PDF document text
    • http://fratellilongoni.com/userfiles/files/4143173736.pdfIn PDF document text
    • https://dolaodong.com/userfiles/file/2468807053.pdfIn PDF document text
    • http://rayocazar.com/images/elfinder-1.1/files/file/jetoxasekebevonemovefep.pdfIn PDF document text
    • http://uniondeautoescuelas.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a00604a59c8---37561426220.pdfIn PDF document text
    • https://thriveelearning.com/wp-content/plugins/super-forms/uploads/php/files/dd1491d25f52d5cbbac11e4e89ac58da/zemovadiludawejuderifata.pdfIn PDF document text
    • http://www.1000ena.com/wp-content/plugins/formcraft/file-upload/server/content/files/16115d6dbb1893---22250453321.pdfIn PDF document text
    • https://ddriu.hu/wp-content/plugins/super-forms/uploads/php/files/364f8f4274739cacfd98e0436833eaa3/69984967988.pdfIn PDF document text
    • https://www.numberoneporthill.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/160c898728371d---64541135234.pdfIn PDF document text
    • http://gld-lining.com/user_img/files/78737999033.pdfIn PDF document text
    • https://pmfegypt.com/userfiles/files/36609881918.pdfIn PDF document text
    • https://bulgariapools.com/contents//files/rifidatigo.pdfIn PDF document text
    • http://lotuscourtpune.com/wp-content/plugins/super-forms/uploads/php/files/909j9ol7uv9m6v98dfpvklgsm0/zasawokewisovuguvoler.pdfIn PDF document text
    • http://moveisgarciadigital.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/16093faeec0897---44741437973.pdfIn PDF document text
    • http://v-lukomorie.com/uploader/files/85620687453.pdfIn PDF document text
    • http://jshtextile.com/UserFiles/file///jedulisub.pdfIn PDF document text
    • http://clearlakesd.org/wp-content/plugins/formcraft/file-upload/server/content/files/1608378d80eb80---7727067359.pdfIn PDF document text
    • http://uniquehotelsolutions.com/files/others/11752609624.pdfIn PDF document text
    • http://gamboeng.com/assets/ckfinder/userfiles/files/65582898040.pdfIn PDF document text
    • http://andlupa.com/userfiles/file/84176086493.pdfIn PDF document text
    • https://izharfoster.com/wp-content/plugins/formcraft/file-upload/server/content/files/160bce792dd671---73407417334.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_off0000e098.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE098 10320 bytes
SHA-256: a0b84cb3097434668b527ec40b4351ec8dfafa9d13054acf2fdad9e02125c036
font_01_sfnt_off0000f7ca.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF7CA 17552 bytes
SHA-256: 4f9ddb6853cd95b95690cbb2cc272495c33ac88aacaee4f65e610e4499d327f4
font_02_sfnt_off000125f1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x125F1 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1