Malicious PDF — malware analysis report

Static analysis result for SHA-256 ad2dbde16a98fe5b…

MALICIOUS

PDF

91.5 KB Created: 2021-09-18 18:51:44 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-11
MD5: 0135b4913ed43011a74ab0a3b78215e1 SHA-1: e047460521b9e510b62e6a639247025ce7b8ea14 SHA-256: ad2dbde16a98fe5b6a6ad47345db88370f80208f3d2eab97a2a03df6ed9a2806
134 Risk Score

Malware Insights

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

The PDF file was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. The heuristics suggest it functions as a link farm on disposable hosting, likely to trick users into downloading further malware. Although no scripts were explicitly extracted, the PDF format itself can embed JavaScript for malicious actions, hence the inclusion of T1059.007.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9726

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.
  • 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 https://vroa.pl/chplusfiles/file/99951762839.pdf In PDF document text
    • http://syntra.pl/userfiles/file/bameketuxoxebobe.pdfIn PDF document text
    • https://fullmagicweekend.com/ckfinder/userfiles/files/67925229947.pdfIn PDF document text
    • http://shortguycentral.com/ck_uploads/files/96318917084.pdfIn PDF document text
    • https://selapro.com.au/application/third_party/ckfinder/userfiles/files/gutot.pdfIn PDF document text
    • http://www.deewanalarab.com/up_imgs/75993468489.pdfIn PDF document text
    • https://aynadakikemalizm.com/resimler/files/xufutiv.pdfIn PDF document text
    • https://amartzon.store/wp-content/plugins/super-forms/uploads/php/files/eec14f07fa58ee9cb59fb14fc2ed692f/pexagojazakuzudezo.pdfIn PDF document text
    • https://masterok-kovka.ru/wp-content/plugins/super-forms/uploads/php/files/ba72eea11e42db8eadd7f8be4c53ecd7/13551646242.pdfIn PDF document text
    • https://daulte.ch/ckfinder/userfiles/files/sekegujudenavosuze.pdfIn PDF document text
    • https://lombardpruszkow.pl/local/userfiles/file/bezulivagusonofukovaze.pdfIn PDF document text
    • http://korvet-sp.ru/userfiles/file/24064751486.pdfIn PDF document text
    • https://akrmedia.no/ckfinder/userfiles/files/manabokezegemiwusefumadi.pdfIn PDF document text
    • http://apismorava.eu/docs/89884871941.pdfIn PDF document text
    • http://propertiesforrent.com/userfiles/file///fomovetiboguraw.pdfIn PDF document text
    • http://xn--3bsx3iw22bmot.com/filespath/files/20210911185142.pdfIn PDF document text
    • http://bangiyaparishadtoronto.ca/bpt/editor/uploadfiles/jominorovox.pdfIn PDF document text
    • https://floridainvestment.cz/files/file/xelubizek.pdfIn PDF document text
    • http://creativeindustries.ru/uploads/userfiles/file/mezomus.pdfIn PDF document text
    • http://showpalmedical.com/userfiles/wazerutarogatob.pdfIn PDF document text
    • http://goodfortune.hk/UpLoadFile/file///baboxegefumumopedar.pdfIn PDF document text
    • http://kenzoum.org/home/integrity/public_html/ckfinder/userfiles/files/kafarekotopa.pdfIn PDF document text
    • https://alternativecarrepair.com/userfiles/file/pusunato.pdfIn PDF document text
    • http://ibconsulting.it/userfiles/files/kosofojadaxedazajaboxifap.pdfIn PDF document text
    • https://stollerco.com/testingsites/advantage_aviation/assets/media/file/xekobomeretarosuvovorozev.pdfIn PDF document text
    • https://hetodon.com/fckeditorfiles/file/rexerimoxomaxalajexa.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/GLLx1DTH0VQ/uplcv?utm_term=9th+standard+social+science+book+in+kannada+pdfPDF 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 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e042.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE042 11020 bytes
SHA-256: efa3f11576daf08e4ca6b02aed93434da516c8558d091c65cbe1c62a0e53f0dc
font_01_sfnt_off0000f991.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF991 16244 bytes
SHA-256: fddcbe21bdf9fb2753729b4ab5b26d7a3fbb01e3fe51d41ab0725360e25c189d
font_02_sfnt_off00010f7b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10F7B 21792 bytes
SHA-256: 3ec78002c2ef7eeb6af9883f767509415c95b85e26756d929924fb5f40c8df97
font_03_sfnt_off00014716.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x14716 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

Open this report in the interactive analyzer, or submit your own file for analysis.