Malicious PDF — malware analysis report

Static analysis result for SHA-256 3ab547d27e754e13…

MALICIOUS

PDF

80.6 KB Created: 2021-09-29 04:53:30 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-14
MD5: e03a4bea12bd81ddbb94cdea08e0c2f6 SHA-1: aba82bc9e4b006b5014b47876a5ef3c5c2c9f686 SHA-256: 3ab547d27e754e13621f3af51efe859658282627ddbb14ba546987acf3562f06
134 Risk Score

Malware Insights

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

The PDF contains embedded JavaScript, which is often used to initiate malicious actions. The heuristic 'PDF_SEO_DISPOSABLE_LINK_FARM' indicates the document is part of a link farm designed to redirect users, and the presence of numerous unknown URLs supports this. The ML classifier and ClamAV detection strongly suggest malicious intent, likely to redirect users to a phishing or malware download site.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9955

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 https://adamslakeband.org/userfiles/file/90288754132.pdf In PDF document text
    • http://janaturismointegrato.com/uploads/file/pekodirewevabix.pdfIn PDF document text
    • https://adamant54.ru/userfiles/files/91978814349.pdfIn PDF document text
    • https://rajatotogroup3.com/contents/files/7475246985.pdfIn PDF document text
    • http://hai-bi.com/uploads/files/202109080622021902.pdfIn PDF document text
    • http://hellnocancershow.com/wp-content/plugins/formcraft/file-upload/server/content/files/1614ddc9b0066f---fexunafijagenuxisilop.pdfIn PDF document text
    • http://viacaosaopedro.com/www/js/ckfinder/userfiles/files/wolatipirozimukuwil.pdfIn PDF document text
    • http://ulv-fogger.ru/d/files/70302214893.pdfIn PDF document text
    • https://ozanetiket.com/TasarimAcarnet/serhali/upload/files/42504435378.pdfIn PDF document text
    • http://biosafety.biz/ckfinder/userfiles/files/beter.pdfIn PDF document text
    • https://himalayanwanderer.com/himalayan/userfiles/files/kupuw.pdfIn PDF document text
    • https://mwasafat.com/uploads/files/48668476196.pdfIn PDF document text
    • http://boek.se/bilder_umeny/File/18934995163.pdfIn PDF document text
    • http://prograsifkalip.com/files/61128733457.pdfIn PDF document text
    • http://dastone.ru/userfiles/file/kutamebepebonudanixikanum.pdfIn PDF document text
    • https://get-insurance.in/ckfinder/userfiles/files/21879026081.pdfIn PDF document text
    • https://groupekheidri.com/ckfinder/userfiles/files/11313893535.pdfIn PDF document text
    • http://epmresearch.org/userfiles/files/64587663294.pdfIn PDF document text
    • http://stainless-faucet.com/uploads/htmlupload/files/33324362414.pdfIn PDF document text
    • http://www.schule.havonix.com/ckfinder/userfiles/files/xujizudanexawez.pdfIn PDF document text
    • http://emusicmarket.com/upfile/board/files/76466421444.pdfIn PDF document text
    • http://pxmonastery.org/CKEdit/upload/files/24391305509.pdfIn PDF document text
    • https://bbensonmft.com/wp-content/plugins/super-forms/uploads/php/files/ee58f1571d8074eb7bd2e339a6b19db7/22514585850.pdfIn PDF document text
    • http://hanabi-la.com/uploads/files/3790585711.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/GLLx1DTH0VQ/uplcv?utm_term=download+game+ppssppPDF 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_off0000d08f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD08F 20212 bytes
SHA-256: fd5f9a44cd8a8db88d8c8810f23813bfe2f4c3f9c63a36469a78b26a74b0bbce
font_01_sfnt_off00010560.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10560 10532 bytes
SHA-256: 1ec7d1c782f6e8b711bf1f9069a7fc1b89bad7d319a7052285b7f973429da73c
font_02_sfnt_off00011d2c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11D2C 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1