Malicious PDF — malware analysis report

Static analysis result for SHA-256 97d80ad691b42ed1…

MALICIOUS

PDF

78.1 KB Created: 2021-07-03 11:21:00 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 439250dd7061bcf15ccbb92a114e4581 SHA-1: fb81f1846eec91ff5539529bc6ebcd17db6e3be6 SHA-256: 97d80ad691b42ed185e190decf8de6406165a71d6607bf3a8fe709d5e1cb8cf4
156 Risk Score

Malware Insights

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

This PDF file was identified as malicious by ML classifiers and ClamAV, indicating a phishing or malware distribution attempt. It functions as a link farm, with numerous embedded URLs pointing to various websites, including those hosted on compromised CMS uploads and disposable domains. The primary purpose appears to be directing users to potentially harmful content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9846

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 http://brette-animation.com/userfiles/file/fexurubovajajewimuwep.pdf
    • https://sidexsideaudio.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b8f3a5ee5b1---kowanejeruwaguxunonegu.pdf
    • https://cplastik.cz/data/cms/file/ligemojoratebidixij.pdf
    • https://service-panev.com/userfiles/17734679887.pdf
    • https://www.medipratik.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608d8f430b4ac---kosanuvopuxuke.pdf
    • https://dpt-mh.com/uploads/news/files/nixakufunileje.pdf
    • https://apoiotelecom.com/imagens/img_fckeditor/file/80976142845.pdf
    • http://xn--80akij1ajew.xn--p1ai/wp-content/plugins/formcraft/file-upload/server/content/files/1608558460dc2d---25241170970.pdf
    • http://www.eflox.net/wp-content/plugins/formcraft/file-upload/server/content/files/16076984915ee0---dabel.pdf
    • http://dabien.co.kr/wp-content/plugins/formcraft/file-upload/server/content/files/16079a8093a55f---51933598718.pdf
    • https://118highschool.am/wp-content/plugins/super-forms/uploads/php/files/9f8e286cd193550c3ce5e93b83dcf99b/karenimezewikuv.pdf
    • http://mijneigenlift.nl/wp-content/plugins/formcraft/file-upload/server/content/files/160c713453df95---80857785839.pdf
    • http://principessavencanice.com/wp-content/plugins/formcraft/file-upload/server/content/files/16085f14fee194---41244000508.pdf
    • https://sf-tfi-pgu.uz/wp-content/plugins/super-forms/uploads/php/files/c59931670f69dd527b80f0bc1a51612f/jirovodaxegugibejibe.pdf
    • https://www.parkgest.ch/wp-content/plugins/formcraft/file-upload/server/content/files/16087b4c26611e---zogegegomevow.pdf
    • http://stilistspb.online/public/files/uploads/files/pakamemupozodofawurupejuv.pdf
    • http://clasesholandes.com/userfiles/file/xagibafilumavaluxuva.pdf
    • https://kfz-gutachter-oliver-schiller.de/wp-content/plugins/formcraft/file-upload/server/content/files/1608fd8b37772f---zuxowiruwero.pdf
    • http://cargo3030.ru/wp-content/plugins/formcraft/file-upload/server/content/files/16086e96a196c2---nubufodukaki.pdf
    • https://www.adilaltinsoy.com/wp-content/plugins/formcraft/file-upload/server/content/files/16073bd411f6a8---33356410236.pdf
    • https://gtsonline.nl/wp-content/plugins/super-forms/uploads/php/files/tmir6b0a3d7rh8vsebeab4tilt/xejule.pdf
    • https://carstenrath.com/wp-content/plugins/super-forms/uploads/php/files/252tlabd4ktco3r04e0g4aubot/1518363802.pdf
    • http://www.argentum.com/wp-content/plugins/super-forms/uploads/php/files/bo0jjkebi0hauo8u4pacs3mhhn/robage.pdf
    • http://unseretochter.com/images/file/karelubin.pdf
    • https://maconlux.lu/userfiles/files/29804723809.pdf
    • https://www.qbuildsoftware.com/wp-content/plugins/super-forms/uploads/php/files/64de327e13aea1a101d458c3b07aa61c/78658739207.pdf
    • https://feedproxy.google.com/~r/Uplcv/~3/GLLx1DTH0VQ/uplcv?utm_term=mountains+of+the+world
    • 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_off0000cf45.bin
e0ef0038ccabb45b3f951a9b0b801021928566d47fa3fbe8070c93ba5f559eb1
pdf-font-stream PDF embedded font (sfnt) at offset 0xCF45 16800 bytes
font_01_sfnt_off0000fae0.bin
cc9a838829c3d443e96066541c3f386e751f369e4087286c408dc80dc99ffbc1
pdf-font-stream PDF embedded font (sfnt) at offset 0xFAE0 10628 bytes
font_02_sfnt_off0001133f.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0x1133F 16792 bytes