Malicious PDF — malware analysis report

Static analysis result for SHA-256 5075a60928f86840…

MALICIOUS

PDF

99.0 KB Created: 2021-10-07 06:48:32 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-11-23
MD5: d8ede78d3e405bc39aa13eebfc5f8f42 SHA-1: 3a98a63c85490c50649444e2e97b80db2f8eb1e6 SHA-256: 5075a60928f86840e0f4d23151f0fb1e48dbcdfcd0d66ce727f781d211d11c46
146 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The sample was flagged by a machine learning classifier and ClamAV as malicious, indicating a high likelihood of malicious intent. The PDF contains numerous embedded URIs, many pointing to external sites, suggesting a phishing or malware distribution scheme. The presence of a raw IP address in one of the URIs further increases suspicion.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9965

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
  • Clickable URI points to raw IP address medium PDF_URI_IP_LITERAL
    PDF contains a clickable HTTP(S) action whose host is a literal IPv4 address. Legitimate documents normally link to named domains; raw-IP destinations are common in disposable phishing and malware-delivery infrastructure.
  • 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://queure.ru/uplcv?utm_term=mcu+movies+and+tv+shows PDF link annotation
    • https://www.indoorclub-informa.com/boletines/img/file/764211093.pdfIn PDF document text
    • http://moje-stranky.eu/userfiles/file/76108513488.pdfIn PDF document text
    • http://fasson.vip/images/editor/files/vobamodinan.pdfIn PDF document text
    • http://mgtuae.com/uploads/file/mitivetesuwiwisipijemi.pdfIn PDF document text
    • http://zavalinka.by/var/upload/file/genozojax.pdfIn PDF document text
    • http://kleinschaden.expert/userfiles/file/18100185586.pdfIn PDF document text
    • http://xn--80aafbanafwvcftiqfecrg2a.xn--p1ai/pict/file/vunalegobuma.pdfIn PDF document text
    • http://eyupsifalibitkiler.com/resimler/files/85104362176.pdfIn PDF document text
    • https://kvizek.excore.hu/ckfinder/userfiles/files/46832845542.pdfIn PDF document text
    • https://championsforchildren.org/wp-content/plugins/super-forms/uploads/php/files/f09ca1dabbc3291507a7489b490388c8/tonufagixifepobuledafod.pdfIn PDF document text
    • http://duszek-lasu.pl/userfiles/file/32441426340.pdfIn PDF document text
    • https://martensmgt.com/business_school/uploads/file/dubumetavapive.pdfIn PDF document text
    • http://espicycooking.com/files/file///58679774840.pdfIn PDF document text
    • http://185.33.116.145/~acus01/upload/files/69543010393.pdfPDF link annotation
    • https://avukatwebsitesi.kocgrafik.net/upload/files/lekipimesilavolema.pdfIn PDF document text
    • http://www.alexgis.com/siteuploads/editorimg/file/kivujolix.pdfIn PDF document text
    • http://cnc-soustruzeni.cz/files/file/letapopufeperu.pdfIn PDF document text
    • http://maremio.ru/admin/ckfinder/userfiles/files/rugomaz.pdfIn PDF document text
    • https://mysilo.com/upload/ckfinder/files/dalemeteli.pdfIn PDF document text
    • http://ibrahimabuomira.com/ckeditor/ckfinder/userfiles/files/24698423575.pdfIn PDF document text
    • https://www.accidentinjurylascruces.com/wp-content/plugins/super-forms/uploads/php/files/cqt7fekdot5kl2vs35vbg14g0j/32278699440.pdfIn PDF document text
    • http://pwmtqatar.net/userfiles/file/wobufixuposipigefa.pdfIn PDF document text
    • http://an-professional.ru/img/files/file/pubixoberak.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_off00011c71.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11C71 19188 bytes
SHA-256: 133a56489852b7882cc20805736387181f859b653ac727a34b9e16d56a041e04
font_01_sfnt_off00014dd6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x14DD6 10732 bytes
SHA-256: 7a98a3ae5e7ee37e373c57cdfff443bf604ec31a04239a4d1609c043489c9dba
font_02_sfnt_off00016669.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x16669 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1