Malicious PDF — malware analysis report

Static analysis result for SHA-256 b568edc30f77a49f…

MALICIOUS

PDF

86.4 KB Created: 2021-09-17 08:31:35 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-23
MD5: 17507604a1a5e8ed5b429b9ae5c18b89 SHA-1: 684259231f88fd6f28ea6f08a77f79c83e76108e SHA-256: b568edc30f77a49fe58198ec180c993b1f60035574d76f58d95e42b8e2cc29d5
196 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains numerous links to external websites, many of which are hosted on compromised CMS platforms or disposable domains, indicating a link farm designed to redirect users to malicious content. The ClamAV detection and ML classifier strongly suggest malicious intent, likely for phishing or malware distribution. No scripts were extracted, but the embedded URLs are the primary indicators of compromise.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9942

Heuristics 7

  • 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 to algorithmically-generated URL high PDF_RANDOM_URL_LINK
    PDF contains a clickable HTTP(S) link whose host looks algorithmically generated (pronounceable-random labels) and whose path/query carries a long high-entropy token. This is the randomized-redirector pattern of malspam phishing lures — the visible document is only a prompt — not a PDF parser vulnerability.
  • 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://hoangphatdanang.com/uploads/image/files/62249839243.pdf In PDF document text
    • https://www.davidcosz.de/wp-content/plugins/super-forms/uploads/php/files/vp8292lhv6gic3pf6cc1mf55lu/gevadazefa.pdfIn PDF document text
    • https://fluffy-chins.com/images/file/xalesozusuvodakulidek.pdfIn PDF document text
    • http://partnercable.com/files/75808779625.pdfIn PDF document text
    • http://ambulatorioveterinariosantanna.eu/userfiles/files/kisurewugipujoroneratugu.pdfIn PDF document text
    • https://nbcmedia.vn/ckfinder/userfiles/files/zoradulagisexufijizi.pdfIn PDF document text
    • https://gulf-rope.com/images/bulk_images/files/33551809363.pdfIn PDF document text
    • https://watosaphotography.com/app/webroot/userfiles/files/20210912_114814.pdfIn PDF document text
    • http://wiskind.com/filespath/files/20210915182116.pdfIn PDF document text
    • https://zebcom.in/userfiles/file/sanovenirokagumimolevomam.pdfIn PDF document text
    • https://shinko-tw.com/UserFiles/file/47527652339.pdfIn PDF document text
    • http://tourhong.com/FileData/ckfinder/files/20210909_944DB05B57E20B13.pdfIn PDF document text
    • https://www.ijmsir.com/ckfinder/userfiles/files/99020061817.pdfIn PDF document text
    • http://thevalleytrader.com/files/perewofifusaxejozexasi.pdfIn PDF document text
    • https://transmar.biz/ckfinder/userfiles/files/pepojaxa.pdfIn PDF document text
    • https://pottoka.info/files/galeria/files/75170709426.pdfIn PDF document text
    • http://sochi-polyana.com/ckfinder/userfiles/files/remonejitepusobodikugu.pdfIn PDF document text
    • http://pc-driver.ru/userfiles/files/zupusak.pdfIn PDF document text
    • http://zhuoxinlaw.com/userfiles/file/20210912005416_1642758406.pdfIn PDF document text
    • https://efckrakow.pl/userfiles/file/bewitusejitemej.pdfIn PDF document text
    • https://www.geosuiteonline.de/wp-content/plugins/formcraft/file-upload/server/content/files/1614119d946302---kamotuz.pdfIn PDF document text
    • http://xn--80affcyoc0ac1f6a.xn--p1ai/admin/modules/ckeditor/ckfinder/userfiles/files/93765998775.pdfIn PDF document text
    • http://snap-drone.com/userfiles/file/pomaxulemoluzabuzezasopeg.pdfIn PDF document text
    • https://www.physioaktivkramer.de/wp-content/plugins/formcraft/file-upload/server/content/files/16139c7f86cccb---2176845093.pdfIn PDF document text
    • https://buzyhub.com/files/3864322203.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/FevRqgeaUVY/uplcv?utm_term=ap+world+history+textbook+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_off0000ee26.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEE26 10844 bytes
SHA-256: 04882ec1984edab3ad6657650ad56f759e3850a3b92e4e4bea3e39410cb4a05c
font_01_sfnt_off00010733.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10733 17252 bytes
SHA-256: 74d91dab5378680a1e158d43d2a50d333415ff2a18f03eb60be1cdf939acefa1
font_02_sfnt_off000133f4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x133F4 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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