Malicious PDF — malware analysis report

Static analysis result for SHA-256 96a846d068c1ac26…

MALICIOUS

PDF

68.9 KB Created: 2021-09-19 03:53:13 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-26
MD5: 3ad9813b17bb73a941da827e9d99fc04 SHA-1: 9600545c36eead16b0f07f066b3ef19aec599400 SHA-256: 96a846d068c1ac26e8b29456b1e0a4c61cf2ef70be2d312f7650ffacbd798eaf
134 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF contains embedded JavaScript and a heuristic firing indicates it is a link farm on disposable hosting, suggesting a phishing or malware distribution attempt. The ML classifier and ClamAV detection strongly indicate malicious intent. The embedded JavaScript likely facilitates the redirection to malicious sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9951

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
  • 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.
  • Embedded JS stream low PDF_JS
    PDF references a /JS stream. Generic JavaScript is common in benign forms; specific dangerous APIs are scored by separate rules.
  • 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 http://owop.challengersports.com/ckfinder/userfiles/files/14373422882.pdf In PDF document text
    • https://laps.pl/userfiles/file/73218949545.pdfIn PDF document text
    • http://valentine.tutaylamhet.com/storage/ckfinder/files/dirivoz.pdfIn PDF document text
    • https://thehamptonsbloomington.com/wp-content/plugins/formcraft/file-upload/server/content/files/1612fe6f09529e---59352344755.pdfIn PDF document text
    • https://www.capitalroofingct.com/wp-content/plugins/formcraft/file-upload/server/content/files/1613988ca43bbc---suxodupujogekewakabowut.pdfIn PDF document text
    • http://cncsprings.com/d/files/92372721040.pdfIn PDF document text
    • https://bankkartya.hu/js/ckfinder/userfiles/files/52890546723.pdfIn PDF document text
    • http://portalcom-b2b.es/img/user//file/_0252146001631134434.pdfIn PDF document text
    • https://pmeds.us/userfiles/file/zuvenenogixetom.pdfIn PDF document text
    • http://bfr-bialapodlaska.pl/userfiles/file/37072497528.pdfIn PDF document text
    • http://xn--80aatg4aaaddkhfhbf3evf.xn--p1ai/ckfinder/userfiles/files/zuposabajijota.pdfIn PDF document text
    • http://changjiujz.com/uploads/files/202109070201029104.pdfIn PDF document text
    • http://falconfam.com/ckfinder/userfiles/files/85335098647.pdfIn PDF document text
    • https://culturasiapamplona.com/guiarte_userfiles/files/34715820676.pdfIn PDF document text
    • http://giovanniseneca.eu/userfiles/files/famopugefalalalexujiv.pdfIn PDF document text
    • https://pollackmihalyiskola.hu/ckfinder/userfiles/files/67358841033.pdfIn PDF document text
    • http://huthamcauquanggiap.com/upload/files/31391988913.pdfIn PDF document text
    • http://tamker.hu/userfiles/file/34698808252.pdfIn PDF document text
    • http://mya1fc.com/files/ckuploads/files/lilididojemimowakab.pdfIn PDF document text
    • http://e-sheremet.com/img/tibobirajijolojuko.pdfIn PDF document text
    • http://canshu.dlzj.net/upload/files/2021091906113316081.pdfIn PDF document text
    • https://havadisname.com/upload/ckfinder/files/medesetog.pdfIn PDF document text
    • http://leicesterbiketec.com/userfiles/file/69578091026.pdfIn PDF document text
    • http://kenzoum.org/home/integrity/public_html/ckfinder/userfiles/files/fenuweka.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/BvfzZFkJO3s/uplcv?utm_term=how+to+call+unknown+on+androidPDF 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_off0000b0ad.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB0AD 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000c8c4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC8C4 10332 bytes
SHA-256: 1947ae5bedb46971fc8ae4ffa92eef3e03a3cb12c02218ed003443eb6e1eea07
font_02_sfnt_off0000e024.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE024 15148 bytes
SHA-256: 75b3131d1d38a2f167baa10a322765aceebfd221014dd65875d47d3c9a467db6