Malicious PDF — malware analysis report

Static analysis result for SHA-256 9565e1f8159a6046…

MALICIOUS

PDF

87.5 KB Created: 2021-09-12 18:46:58 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-11-21
MD5: 99402a616078d34006b5fa870d4933dc SHA-1: 3d7d8aff0f4ec7759cd95ab71bcfa01723dce76c SHA-256: 9565e1f8159a60465b282534bfa68701019a0004ac9d5975908c9d99c82317a9
186 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF was flagged by ML classifiers and ClamAV as malicious, specifically as a phishing trojan. The heuristic 'SE_CLIPBOARD_COMMAND_LURE' indicates the document likely instructs the user to copy and paste content into a command-line interface, a common tactic to trick users into executing malicious commands. The presence of numerous external URIs, many pointing to disposable hosting, further supports a phishing or malware distribution scheme.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9982

Heuristics 7

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • Clipboard command execution lure high SE_CLIPBOARD_COMMAND_LURE
    Document tells the user to copy or paste clipboard content into Run, PowerShell, cmd, or another shell-like execution context
  • 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://irlanc.ru/uplcv?utm_term=upgrade+win+xp+to+win+10 PDF link annotation
    • http://studiotecnicofrisoli.com/userfiles/files/63088888059.pdfIn PDF document text
    • http://mientrungland.net/uploads/image/files/64432040201.pdfIn PDF document text
    • http://frangarcia.eu/upload/file/tetekapapakeramuwowef.pdfIn PDF document text
    • https://mimpishio2.net/contents/files/puvagizosavulaguvaw.pdfIn PDF document text
    • http://www.kliningstroy.ru/wp-content/plugins/formcraft/file-upload/server/content/files/161333d3bb4d1a---49155491284.pdfIn PDF document text
    • http://yenidenyuzlendirme.com/ckfinder/userfiles/files/21447092248.pdfIn PDF document text
    • http://elsekmont.eu/userfiles/file/87599608074.pdfIn PDF document text
    • http://raylutickenterprises.com/userfiles/files/gazeduxupakexosaxu.pdfIn PDF document text
    • https://pokereshop.cz/data/file/92912339573.pdfIn PDF document text
    • http://domgr11.ru/uploads/files/85171440385.pdfIn PDF document text
    • https://verlauf-ekb.ru/admin/ckfinder/userfiles/files/23852358575.pdfIn PDF document text
    • https://ecohort.com/userfiles/files/78265752183.pdfIn PDF document text
    • http://www.saaegfpolis.org.br/ckfinder/userfiles/files/35000246521.pdfIn PDF document text
    • http://pileki.com/imgup/file/3624494835.pdfIn PDF document text
    • http://eia-edu.com/userfiles/file/nigifam.pdfIn PDF document text
    • http://185.33.116.145/~acus01/upload/files/18217379541.pdfPDF link annotation
    • https://snqrsl.quebec/upload/editor/file/16516543584.pdfIn PDF document text
    • https://leonardscopysystems.com/home/leonards/public_html/ckfinder/userfiles/files/68378660299.pdfIn PDF document text
    • http://as-eng.biz/userfiles/file/32636982269.pdfIn PDF document text
    • http://spielundlicht.de/content_provider/documents/files/kimaboj.pdfIn PDF document text
    • http://studiopedrazzini.eu/userfiles/files/zaliruwidas.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_off0000edb1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEDB1 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off000105c3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x105C3 19020 bytes
SHA-256: 44dc8243f0fd1cfac7baaa4ef39313c25083b3a46f22ada4442f372c4d0b0c8d
font_02_sfnt_off0001379d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1379D 10720 bytes
SHA-256: bfb2abbc1fab69477aaa7419269fa46bd55e45ba5e6e37515dac29c692072a4c