Malicious PDF — malware analysis report

Static analysis result for SHA-256 696a113f7b6e6579…

MALICIOUS

PDF

83.8 KB Created: 2021-09-09 00:10:47 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-16
MD5: f072e4bf558a85ef38a515d406e33913 SHA-1: 4aeec2a4e478c9edbb359293f30f4afce4aac1cb SHA-256: 696a113f7b6e6579d87f20e30b7851542b2da07094b91ac89c5d7d6b7d907306
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

The PDF file was identified as malicious by ClamAV and an ML classifier, exhibiting characteristics of a link farm. It contains numerous URLs pointing to various websites, including those hosted on compromised CMS platforms. The primary function appears to be directing users to external sites, which could lead to phishing attempts or further malware downloads.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9974

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://crewmak.ru/uplcv?utm_term=play+old+windows+games+on+android PDF link annotation
    • http://businessplan-capalpha.eu/mbp/upload/images/images/upload/ckfinder/44997365466.pdfIn PDF document text
    • http://www.sunarmisir.com.tr/wp-content/plugins/super-forms/uploads/php/files/if542vhj8ur628bcgkrcjnrjc2/vumofezuxumewib.pdfIn PDF document text
    • https://tefen67.com/userfiles/files/46038555448.pdfIn PDF document text
    • http://smolninskayahotel.com/userfiles/file/50544797765.pdfIn PDF document text
    • http://wonikquartz.com/upload/editor/file/1630663519.pdfIn PDF document text
    • https://allegypttours.net/userfiles/files/85999998620.pdfIn PDF document text
    • https://micsys.in/userfiles/file/vilipexur.pdfIn PDF document text
    • http://delfosventures.com/userfiles/files/mufafifosumodefe.pdfIn PDF document text
    • https://t4g.nasscomfoundation.org/wp-content/plugins/super-forms/uploads/php/files/he83qc9h3gj7s2o77qnpnkcs41/mezenexu.pdfIn PDF document text
    • http://rlangkhan.com/upload/userfiles/files/64609246252.pdfIn PDF document text
    • http://urdu-hadith.com/survey/userfiles/files/pozijela.pdfIn PDF document text
    • https://derfo.info/resimler/files/todalenekux.pdfIn PDF document text
    • http://huntland.hu/upload/file/wirujozigajoneriz.pdfIn PDF document text
    • http://dongshengcable.com/images/upload/File/5686856221.pdfIn PDF document text
    • http://thuaphatlailongthanh.vn/upload/contentFile/minhchau/file/24932862267.pdfIn PDF document text
    • https://www.restaurant-latableedevercel.com/ckfinder/userfiles/files/lotulifizalevepagefesovin.pdfIn PDF document text
    • https://mcq-exambd.bdbabymart.com/app/webroot/ckfinder/userfiles/files/jivutukovomuro.pdfIn PDF document text
    • http://gesundezellen.com/neu/userfiles/file/jopepivekunepeloruxez.pdfIn PDF document text
    • https://directorvincentchow.com/fck_filemanager_upload/file/96679181035.pdfIn PDF document text
    • http://conservationenergy.com/wp-content/plugins/formcraft/file-upload/server/content/files/161319f6c8551b---buletun.pdfIn PDF document text
    • https://computerzone.pk/file/75209974414.pdfIn PDF document text
    • http://linker-apps.com/files/divudini.pdfIn PDF document text
    • http://xn--tnqz8hz5cb8l.com/upload/files/12651172702.pdfIn PDF document text
    • http://architettotamborra.eu/userfiles/files/zawoverunaxu.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_off0000e2d2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE2D2 10696 bytes
SHA-256: 8dd9d86855a974d83e1ccb6852d1478d22b4ff37751dd91e05d7f2fd4d1498f3
font_01_sfnt_off0000fb26.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFB26 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off00011338.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11338 17876 bytes
SHA-256: d87e5a37dc1f1b65f0d7b69eac22372c5166955b9222736fd80f373d6dc554a9

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