Malicious PDF — malware analysis report

Static analysis result for SHA-256 960f9b0ba2ae417c…

MALICIOUS

PDF

69.5 KB Created: 2021-09-25 00:23:34 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-26
MD5: 35718123b69ccae9af7f1cd7b04af892 SHA-1: 138bb0991fc72546a20748216ee72f5411c32b01 SHA-256: 960f9b0ba2ae417c721aecd3e5699bdb948883e201d23913da188c7e6c79faad
126 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains a large number of embedded URLs, many of which are hosted on disposable domains and utilize UTM parameters, strongly suggesting a phishing or malware distribution campaign. The ClamAV detection and ML classifier further confirm its malicious nature. While no scripts were explicitly extracted, the PDF structure and embedded URIs indicate an attempt to redirect users to malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9954

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://pixomot.ru/uplcv?utm_term=cach+lam+ca+ri+ga PDF link annotation
    • http://phutungquanghieu.com/app/webroot/files/ckfinder/files/sojaluxuvixazufumuzadak.pdfIn PDF document text
    • http://restauraceeverest.cz/userfiles/file/volabidarote.pdfIn PDF document text
    • http://nilesk.com/userfiles/file/xigevut.pdfIn PDF document text
    • http://dzirerealtors.com/uploads/somoxamikizovelamufet.pdfIn PDF document text
    • http://rioairporttransfer.com/ckfinder/userfiles/files/fupivomuxomijijumivoxidu.pdfIn PDF document text
    • http://bedrucken24.de/userfiles/file/sedepokujobozobutaji.pdfIn PDF document text
    • http://kammatrans.com/userfiles/files/18184333647.pdfIn PDF document text
    • http://juditphotography.com/picture/userfiles/file/62068127706.pdfIn PDF document text
    • https://aawyx.com/sites/default/imageuser/file/71875041328.pdfIn PDF document text
    • http://jdjcnc.com/upfolder/e/files/20210919172338.pdfIn PDF document text
    • https://robertbah.si/files/file/vumarixipeduzanumofepumug.pdfIn PDF document text
    • https://0286869143.com/editor_images/files/87212052380.pdfIn PDF document text
    • https://smwebtechnology.com/arishayurveda.com/userfiles/file/51281571899.pdfIn PDF document text
    • http://www.kigimex.com.vn/ckfinder/userfiles/files/47303293202.pdfIn PDF document text
    • https://floridainvestment.cz/files/file/97852794424.pdfIn PDF document text
    • http://www.europesolidaire.eu/userfiles/files/69166893008.pdfIn PDF document text
    • http://tekizolasyon.com/ckfinder/userfiles/files/81256343008.pdfIn PDF document text
    • https://eagle-aviation.com/userfiles/files/83157484947.pdfIn PDF document text
    • https://technok.cz/wp-content/plugins/super-forms/uploads/php/files/74ee4257db771186a3259b8cbe4d6c35/rerotadi.pdfIn PDF document text
    • http://www.contectrade.hu/fckfiles/file/zukenuxoxobe.pdfIn PDF document text
    • http://facyt.com.ar/ckfinder/userfiles/files/gizawisitupiru.pdfIn PDF document text
    • http://themultifold.com/wp-content/plugins/super-forms/uploads/php/files/7199d1p9oe4gasesc68gfeuql3/zijesujupowoxilomojuke.pdfIn PDF document text
    • http://sindikat777.ru/ckeditor/ckfinder/core/connector/php/uploads/files/52345760220.pdfIn PDF document text
    • http://madinagirls.com/easydo%20v2.00/files/uploads/xitiben.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_off0000aec7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xAEC7 16996 bytes
SHA-256: 93b7c2446b5568b9165fa8fcf9e1696ce478793eea8404612b5581de9c2577a3
font_01_sfnt_off0000d8ed.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD8ED 10084 bytes
SHA-256: b48670f3ceed39ff291ba4a8c25da02571321f8d6b3b4c769281b25775d8d4e5
font_02_sfnt_off0000ef48.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEF48 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1