Malicious PDF — malware analysis report

Static analysis result for SHA-256 896d9cddf5f5e31a…

MALICIOUS

PDF

88.2 KB Created: 2021-08-12 06:38:41 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-12
MD5: 0d08587d9e6727f7e8ba43f2d03d94d8 SHA-1: 244abbe8d512c6754a9c8eb89a9e34db0fa20999 SHA-256: 896d9cddf5f5e31a6523daca33e0f43eafa86801beefde28a7dfe1cac4a639c9
156 Risk Score

Malware Insights

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

This PDF file was flagged by a machine learning classifier and ClamAV as malicious. It contains numerous links, many pointing to compromised WordPress upload directories and disposable hosting, suggesting a link farm designed to distribute malicious content. The presence of external URIs and the overall structure indicate a phishing or malware distribution attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9991

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://rdsdealers.com/ckfinder/userfiles/files/59211878148.pdf In PDF document text
    • https://zlatartopalovic.rs//files/xexefotopamemewiwexorurur.pdfIn PDF document text
    • http://kondicionery-vidnoe.ru/upload_picture/file/64998192407.pdfIn PDF document text
    • https://forumhotel.by/wp-content/plugins/super-forms/uploads/php/files/hca92u90q1kfr6hkstd82t3191/33990615357.pdfIn PDF document text
    • https://wfca-czech.cz/temp/userfiles/files/37903598174.pdfIn PDF document text
    • https://aryaayur.com/wp-content/plugins/formcraft/file-upload/server/content/files/160703e2a6fc54---29394101506.pdfIn PDF document text
    • http://maility.pl_adresuserfiles/file/wololiriruris.pdfIn PDF document text
    • http://ledson.ru/upload_picture/faxapivanuradafegexo.pdfIn PDF document text
    • http://www.1000ena.com/wp-content/plugins/formcraft/file-upload/server/content/files/160bb9d87ebf8e---30945716601.pdfIn PDF document text
    • http://www.holderit.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a79606c9ba4---visapuj.pdfIn PDF document text
    • http://premiumcsp.com/uploads/files/12330205745.pdfIn PDF document text
    • http://thephinhmienbac.com/upload/files/ninutufow.pdfIn PDF document text
    • http://csc-028.com/userfiles/file/20210615181151_np11yp.pdfIn PDF document text
    • https://victorybear-info.com/userfiles/files/xuwazezuwegasuvapatod.pdfIn PDF document text
    • https://electroagro.es/pub/files/39881486740.pdfIn PDF document text
    • https://atphp.ch/userfiles/file/loxefufetazurokumevejewo.pdfIn PDF document text
    • http://www.ibadirect.com/wp-content/plugins/formcraft/file-upload/server/content/files/160e5450635366---soladosofivuwubabibexu.pdfIn PDF document text
    • https://kfk-dekoration.dk/images/uploadedimages/file/68634413568.pdfIn PDF document text
    • https://drmiamiconnect.com/wp-content/plugins/super-forms/uploads/php/files/e7649465add5fbc8c88286292c5a7ba2/41043276206.pdfIn PDF document text
    • https://protectname.xyz/whoisprivacy/userfiles/files/wexuzaxodikimopivumemig.pdfIn PDF document text
    • http://www.kissdocs.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/1606d7f851ece4---65519600505.pdfIn PDF document text
    • https://saftanton.dk/wp-content/plugins/formcraft/file-upload/server/content/files/1607277d8a9361---34129902382.pdfIn PDF document text
    • http://jarosi.hu/files/file/89577102658.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/6naE_Nh8_CY/uplcv?utm_term=anatomia+sistema+nervioso+simpatico+y+parasimpaticoPDF 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_off0000f2c1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF2C1 10652 bytes
SHA-256: ca37fc684be10c9dcfe763771fce89c6fc5217b005d9852a788363ac931db67d
font_01_sfnt_off00010b38.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10B38 17764 bytes
SHA-256: 290db3aedc547d6b3973d46f60b99bb9ded71635e6ddb13251df2528784faafc
font_02_sfnt_off00013876.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13876 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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