Malicious PDF — malware analysis report

Static analysis result for SHA-256 42d977bbdbe725e9…

MALICIOUS

PDF

82.2 KB Created: 2021-09-12 22:03:52 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-24
MD5: aa50b3c15e6f28c1dbff5eef778aeafc SHA-1: 7e1a06cc26d1ce7709a5c458641213012decb15c SHA-256: 42d977bbdbe725e940910fc41293ee87065ceaf77cc09fd58f8eea4fdd3497d2
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. The ML classifier and ClamAV detection strongly indicate malicious intent. The embedded JavaScript likely redirects to external URLs, as suggested by the PDF_URI and EMBEDDED_URL heuristics, which are often used for phishing or to download further malicious payloads.

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 http://on-video.com/movies/movie_data/file/fodururibonidawigu.pdf In PDF document text
    • https://niboparis.com/upload/fckeditor/files/42810535142.pdfIn PDF document text
    • http://daglichtfilters.nl/ckfinder/userfiles/files/65284180780.pdfIn PDF document text
    • http://argentum.com/wp-content/plugins/super-forms/uploads/php/files/g330adcheqnv8u42cohccb6kv6/90428792204.pdfIn PDF document text
    • http://www.phsdcenter.com/temp/js/ckfinder/userfiles/files/kupap.pdfIn PDF document text
    • http://uceng.net/_UploadFile/Images/file/ziwaxetumus.pdfIn PDF document text
    • http://vanillasky-ch.com/images/files/21538445426.pdfIn PDF document text
    • http://hkbroadwin.com/userfiles/18926189093.pdfIn PDF document text
    • http://ttc-investco.com/img/files/vuwunosakizuwovibobuw.pdfIn PDF document text
    • https://sodigital.it/wp-content/plugins/formcraft/file-upload/server/content/files/16133b24b839f0---97419880841.pdfIn PDF document text
    • http://dep14kirov.ru/userfiles/file/34514161415.pdfIn PDF document text
    • https://abzesolar.com/uploads/files/52061869095.pdfIn PDF document text
    • https://jdsliquorlocker.com/nbloom/fckuploads/file/45202342702.pdfIn PDF document text
    • http://cofetariafraguta.ro/UserFiles/file/29626284853.pdfIn PDF document text
    • http://www.anjhimayath.com/upload/file/13865876901.pdfIn PDF document text
    • https://leise.ru/admin/ckfinder/userfiles/files/42474291960.pdfIn PDF document text
    • http://sabaispa.net/userfiles/file/genidimexarafalitovaporan.pdfIn PDF document text
    • http://gezond-trakteren.nl/kasteel-doornenburg-img/bestandenfile/7622496003.pdfIn PDF document text
    • https://gameclub.by/uploads/files/mupafa.pdfIn PDF document text
    • http://lex.tj/img/file/4646838785.pdfIn PDF document text
    • http://teplorium.su/userfiles/file/golasufoperigaxufipiwu.pdfIn PDF document text
    • https://reclamesticker.nl/images/uploads/file/In PDF document text
    • http://avvocatogiuliani.it/userfiles/files/dagaz.pdfIn PDF document text
    • http://deauville.ru/files/file/49791443071.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/6naE_Nh8_CY/uplcv?utm_term=french+teacher+jobs+in+malaysiaPDF 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_off0000d1be.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD1BE 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000e9d5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE9D5 17716 bytes
SHA-256: bd231f2163fb390b4b9908a78a312d23fba924f4fefefa0bd30d3f7f4cca13b7
font_02_sfnt_off00011748.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11748 14424 bytes
SHA-256: 0c4996373e915c3b57282f6c74589e3b683ef3318997024f029d25d87e0367a3

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