Malicious PDF — malware analysis report

Static analysis result for SHA-256 f755f3f09548a2b3…

MALICIOUS

PDF

71.0 KB Created: 2021-09-07 03:45:41 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-23
MD5: 1f9373a8496e5567dde45aa16875b7a5 SHA-1: b147398b191e30013686403850ef307eadbbbc98 SHA-256: f755f3f09548a2b3599d9e86ae9bb96a8e8c7101c4ca93a4217c38a8124d9549
156 Risk Score

Malware Insights

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

This PDF file was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. It functions as a link farm, containing numerous URLs pointing to external sites, some of which are hosted on compromised CMS platforms or disposable domains. The primary purpose appears to be redirecting users to potentially harmful content, aligning with phishing or malware distribution tactics.

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://adikketiga.com/contents//files/19532591523.pdf In PDF document text
    • https://studiorampinelli.com/file/81084217842.pdfIn PDF document text
    • http://falconltd.pl/cache/file/14422321217.pdfIn PDF document text
    • https://majubesar.org/contents/files/bamadepomukapoxewerota.pdfIn PDF document text
    • http://huile-de-nigelle.info/userfiles/file/favegokovowupulu.pdfIn PDF document text
    • http://imailbox.nl/images/uploadedimages/file/67367776121.pdfIn PDF document text
    • https://bechtoldpaving.com/wp-content/plugins/super-forms/uploads/php/files/882ebcb9c11c73e6993290408ca35e11/tijisubidojuvinutibujowin.pdfIn PDF document text
    • http://geology.ie/wp-content/plugins/formcraft/file-upload/server/content/files/1606cc7c2b0d52---timuloguwabozu.pdfIn PDF document text
    • https://dongytueduc.com/wp-content/plugins/super-forms/uploads/php/files/l0ift53rmk9hchjqjdm43v6s78/31809352554.pdfIn PDF document text
    • http://1-cities.com/blog_images/blog_/file/46141462510.pdfIn PDF document text
    • http://merwepizza.com/upload/file/denowegif.pdfIn PDF document text
    • http://www.holzbau-hoelzl.at/wp-content/plugins/formcraft/file-upload/server/content/files/160b092ad5854c---24386207021.pdfIn PDF document text
    • https://magnettoptan.com/upload/ckfinder/files/mofameduj.pdfIn PDF document text
    • http://www.justgiveahand.org/wp-content/plugins/formcraft/file-upload/server/content/files/160887b9b1dfb9---saver.pdfIn PDF document text
    • https://conexkarvan.com/cache/fck_files/file/9751855215.pdfIn PDF document text
    • https://nam.it/wp-content/plugins/formcraft/file-upload/server/content/files/1606ce730151ee---pilirixupalejijifedaro.pdfIn PDF document text
    • http://startent.ru/SITE/files/editor/file/gugawoludo.pdfIn PDF document text
    • http://sonnenheizungen.ch/fckeditor/editor/images/file/sadoxit.pdfIn PDF document text
    • http://chamdure.com/DATA/files/riviriwojomabololani.pdfIn PDF document text
    • https://xlspandoek.nl/userfiles/file/nofesosevijazefug.pdfIn PDF document text
    • http://armanetti.com/images/pifoxume.pdfIn PDF document text
    • https://marksiegeldds.com/wp-content/plugins/super-forms/uploads/php/files/9d604a6d6fd52c41a39944613820b42a/70015527411.pdfIn PDF document text
    • http://asu.com.vn/wp-content/plugins/super-forms/uploads/php/files/fdp276qgef2n976thuig0mav1v/vugitemawowusarodinuke.pdfIn PDF document text
    • http://geodeslaboratori.eu/userfiles/files/mixejup.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/YTWXjIUwRh0/uplcv?utm_term=english+grammar+level+a2+pdfPDF link annotation
    • 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_off0000b847.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB847 10896 bytes
SHA-256: 43b122d495fc3b189f65d9c3427ce322259a34567d1f31ba93cf3adaa22d063d
font_01_sfnt_off0000d113.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD113 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off0000e925.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE925 14828 bytes
SHA-256: aa1bed88fd4e8a3dfcee90c8fe6c8da8bb9af7cb3cb2089d7ef53a42630400e6

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