Malicious PDF — malware analysis report

Static analysis result for SHA-256 97eacc0f713aa96d…

MALICIOUS

PDF

86.0 KB Created: 2021-07-08 06:15:18 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: e90c4e36d08a98ba3be18574cdce8354 SHA-1: ab243be5bcf41ddae6b25c93dbf67098c33524f6 SHA-256: 97eacc0f713aa96d2562a51c9f919e4ea773bca28c2eb86f6b846051f3358a2e
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains numerous embedded URLs pointing to various domains, many of which appear to be compromised or disposable hosting. Heuristics indicate a 'link farm' pattern, suggesting the document's primary purpose is to redirect users to external malicious sites. The ML classifier and ClamAV detection strongly support its malicious nature, classifying it as a phishing or trojan PDF.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9947

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://inwebjor.ru/uplcv?utm_term=human+sketch+for+beginners
    • https://shotclock.ca/wp-content/plugins/super-forms/uploads/php/files/b81f740e056db21bea9f58096765ffb8/lafusikeruviwapugale.pdf
    • http://palaciodelosnavas.com/userfiles/file/6306519623.pdf
    • http://irollee.com/userfiles/file/10978155011.pdf
    • https://www.fifatravels.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609fc271865b2---5998485597.pdf
    • http://sshs1962.info/clients/3/33/33dcd814b32da85629335a95ab3d0158/File/nenumonawugakosojifevaviw.pdf
    • http://asztalosweb.hu/userfiles/file/fateparagedoz.pdf
    • http://xn----8sbpvg0afdbe.xn--p1ai/wp-content/plugins/super-forms/uploads/php/files/6a1jldjkg1horh1fl854r7g9q3/55891244466.pdf
    • https://carrieres-pierre.com/userfiles/file/vaxajugamuximos.pdf
    • http://afghansolar.com/userfiles/file/godekodijabepopek.pdf
    • https://omomediacion.com/wp-content/plugins/super-forms/uploads/php/files/7ecde667b65586f9e6c762e05bebc65b/xevofibiridotufepusu.pdf
    • https://ambientltg.com/wp-content/plugins/super-forms/uploads/php/files/2d598b1682c9304bc258eebea79b6d78/54090418652.pdf
    • https://bikidi.com/UpFiles/WebEditorFiles/file/gonitijew.pdf
    • https://rclurie.com/wp-content/plugins/super-forms/uploads/php/files/73757a5b42236de2623696c4a2e39e0e/75953764738.pdf
    • http://www.ellisrasbetonwerke.co.za/wp-content/plugins/formcraft/file-upload/server/content/files/1607c2bb8f32bc---91875390679.pdf
    • http://www.risingstars.com.tr/wp-content/plugins/formcraft/file-upload/server/content/files/1607c866d93d80---vegeb.pdf
    • https://www.siemers-deutschmann.de/wp-content/plugins/super-forms/uploads/php/files/7qu2to5cp53t9hesofta8uh184/xajodamegewafulinatara.pdf
    • https://forkidsvietnam.vn/wp-content/plugins/super-forms/uploads/php/files/vfas7kjub64ffdlqlu8g66svsm/midunureket.pdf
    • http://brandnewgoods.net/userfiles/file/38616059254.pdf
    • http://ahkjt.com/upfile/file/susozudumilekaro.pdf
    • http://ildungrice.com/fileupload/fckeditor/file/8846038380.pdf
    • http://hochrainer-elsner.at/upload/files/12664172037.pdf
    • http://www.biotanika.pl/upload/file/lavisaserifewobedive.pdf
    • http://rw-hse-businessconsulting.de/userfiles/file/64059785471.pdf
    • http://smartickgroup.com/userfiles/76448926596.pdf
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/
    • http://dejavu.sourceforge.net
    • http://dejavu.sourceforge.net/wiki/index.php/License

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000ed08.bin
e3814cd4cd6871f07c0ebb89e0629e48daf0d9bd850111d07eb305195f4fb9d5
pdf-font-stream PDF embedded font (sfnt) at offset 0xED08 11060 bytes
font_01_sfnt_off00010694.bin
7eb5de405ae5b314d24b23ca50c4cd947a71c6044522c4fafa1588bfb8d761a5
pdf-font-stream PDF embedded font (sfnt) at offset 0x10694 16928 bytes
font_02_sfnt_off00013276.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0x13276 16792 bytes