Malicious PDF — malware analysis report

Static analysis result for SHA-256 02563aece4ea1839…

MALICIOUS

PDF

87.8 KB Created: 2021-09-19 21:21:20 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-12
MD5: 65741f2fb6cce3ef2be8d93821057d0d SHA-1: 68a7da4a315ba6b185aa3a8b20d981c4597e12e7 SHA-256: 02563aece4ea1839490b88668b34e1ec03390f237c848583e9016bbaf67db952
134 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains embedded JavaScript, a common technique for executing malicious code within documents. It also exhibits characteristics of a link farm, with numerous distinct hosts and a high number of external URIs, suggesting an attempt to obscure the ultimate destination or distribute malicious content across multiple sites. ClamAV and ML classifiers strongly indicate malicious intent, likely phishing or malware distribution.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9976

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 http://benrassam.com/uploads/files/zugem.pdf In PDF document text
    • https://bnbcostaverde.it/userfiles/file/susupu.pdfIn PDF document text
    • http://phuongsen.com/img-chamthi/files/39176068535.pdfIn PDF document text
    • http://yongqingtech.com/d/files/15234001583.pdfIn PDF document text
    • http://abwingsbuffalo.com/uploads/files/sexoretasoje.pdfIn PDF document text
    • http://www.ville-civaux.fr/admin/js/ckfinder/userfiles/files/53239985884.pdfIn PDF document text
    • http://skkouty.cz/ckfinder/userfiles/files/4497908565.pdfIn PDF document text
    • https://jungleflightchiangmai.jungle-flight.com/Uploads/files/didarul.pdfIn PDF document text
    • http://bowlingkillers.com/imgdb/files/zevumowurukifajisife.pdfIn PDF document text
    • https://heart-calligraphy.com/uploads/files/202109140446292106.pdfIn PDF document text
    • https://kominove-centrum.cz/media/files/file/vakezasutubelenuwake.pdfIn PDF document text
    • http://niestachow.pl/data/aktualnosci_imgs/file/39282044193.pdfIn PDF document text
    • http://shahnawazonline.com/uploads/files/tozisafozujigiwopijup.pdfIn PDF document text
    • https://egyediajandekotletek.hu/mvc/userfiles/file/49906428354.pdfIn PDF document text
    • http://www.skup.it/wp-content/plugins/formcraft/file-upload/server/content/files/16144bce7725b7---97029344954.pdfIn PDF document text
    • https://polandpools.com/contents/files/nawajenuzozamuzubexuw.pdfIn PDF document text
    • http://imobilestore.de/userfiles/file/pogowowifanakufekavajo.pdfIn PDF document text
    • http://buren-kompanie.de/userfiles/files/midewovuvavadadoxem.pdfIn PDF document text
    • https://go2germany.ru/files/file/8240017822.pdfIn PDF document text
    • https://geneolock.com/locktactyuma/userfiles/file/loborejumabovujikukofadol.pdfIn PDF document text
    • http://chiangmai-clean.com/user_img/files/suluwewokosalovodipo.pdfIn PDF document text
    • https://bbu.vn/Images_upload/files/mozobolavoxanivafetijobu.pdfIn PDF document text
    • http://staresecurity.com/userfiles/file/57908098965.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/cv9VXjIrmdE/uplcv?utm_term=air+force+1945+modPDF 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_off0000f0c1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF0C1 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off000108d8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x108D8 10472 bytes
SHA-256: 19052f720b47df5dfff30dceb2aad3000e0ff46c042806eef23f0a8dedc464f2
font_02_sfnt_off000120bd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x120BD 18944 bytes
SHA-256: 8a334233e9c2198e8baa6cb0b8adae278446e24f90010af5bd9ffd6d6705751d

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