Malicious PDF — malware analysis report

Static analysis result for SHA-256 6994ca19a940c631…

MALICIOUS

PDF

82.7 KB Created: 2021-09-13 02:10:09 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-24
MD5: 3333fb1deb5846aba3fdccbbc9445c0d SHA-1: d48c8f3744d7a0d9269428797d7833c4181e4d98 SHA-256: 6994ca19a940c6311d959fe09018fb07dec9867f96bfb4ca0b82dee95fe43037
142 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

The file was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. The PDF contains heuristics related to link farms and urgency lures, suggesting it's designed to trick users into clicking on malicious links. The presence of numerous unknown URLs further supports this, pointing towards a phishing or malware distribution scheme.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9974

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
  • 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.
  • Urgency / deadline lure low SE_URGENCY_LURE
    Document contains urgency or deadline language ('account will be terminated', 'action required within 24 hours', etc.) — useful context, but low-signal without other findings
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • 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://wadirumshootingstars.com/userfiles/file///jezutisu.pdf In PDF document text
    • http://hublihorse.com/uploads/userfiles/files/rikowazigomigavujawuvoga.pdfIn PDF document text
    • http://lacasedescaraibes.fr/file/32810784214.pdfIn PDF document text
    • http://0851gay.org/userfiles/202109file/2021090408071770554.pdfIn PDF document text
    • http://revize-elektro.info/UserFiles/File/sekirajarotogawenapi.pdfIn PDF document text
    • https://asiatravel.kg/wp-content/plugins/super-forms/uploads/php/files/360223738b59f25708dc9296309838cb/salogupigimufonizabasudu.pdfIn PDF document text
    • https://biodez.lt/i/File/43172304619.pdfIn PDF document text
    • https://collinite.pl/userfiles/file/femewunajivopuwikupirur.pdfIn PDF document text
    • https://ilonew.tasksplan.com/userfiles/files/bedagonunorobewokixuwu.pdfIn PDF document text
    • https://kakvkusno26.ru/wp-content/plugins/super-forms/uploads/php/files/53b40936a66bfcf0182f12ca64639a0d/23791823203.pdfIn PDF document text
    • http://puntolinea.org/userfiles/files/kaduzefijupib.pdfIn PDF document text
    • https://vietnam-pump.com/userfiles/file/59928177766.pdfIn PDF document text
    • https://clinicscrm.com/img/files/jizid.pdfIn PDF document text
    • http://shuimotongyuan.com/userfiles/file/18257071902.pdfIn PDF document text
    • https://mamap.in/ci/userfiles/files/98786039610.pdfIn PDF document text
    • http://upnbkk.com/file_media/file_image/file/43853043482.pdfIn PDF document text
    • https://blugarden.eu/file/49329948817.pdfIn PDF document text
    • http://rheinmotel.com/userfiles/file/bapurobolesivotexufetam.pdfIn PDF document text
    • https://nawaasha.org/userfiles/file/55204628723.pdfIn PDF document text
    • http://ktcyy.com/ckfinder/userfiles/files/37571349651.pdfIn PDF document text
    • http://sial.pl/galeria/file/bakamawonilukesofoge.pdfIn PDF document text
    • https://partroyfuneralhome.com/partroy/assets/file/23462062024.pdfIn PDF document text
    • http://thegioixedap.net/upload/files/xifone.pdfIn PDF document text
    • http://tw-jia.com/uploads/files/202109022144005337.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/GLLx1DTH0VQ/uplcv?utm_term=name+shadow+art+maker+mod+apk+downloadPDF 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_off0000db54.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDB54 18812 bytes
SHA-256: f71661d9e6e15317e93d447248968ecb28e2d0aa6b9e554f7e02ed7b52ee06b0
font_01_sfnt_off00010c2f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10C2F 10720 bytes
SHA-256: 3f7a45c2856823436c0842b315ca3ca87206e6075dd02eee78b580f2030a6ead
font_02_sfnt_off000124b4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x124B4 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1