Malicious PDF — malware analysis report

Static analysis result for SHA-256 8046c754ba51d1af…

MALICIOUS

PDF

79.7 KB Created: 2021-10-08 11:27:58 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-11-21
MD5: a89439cb4bafbb0e8432fc93e37632da SHA-1: 5768f7b67dea2317c5c715cac94e9fda0bc87ff7 SHA-256: 8046c754ba51d1af6a46bd7b6267c85b42d8fbe1e3f87671a276399c288cafae
134 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains embedded JavaScript and numerous external URIs, indicating an attempt to redirect the user to malicious websites. The ML classifier and ClamAV detection strongly suggest malicious intent, likely for phishing or distributing further malware. The presence of embedded JS points to T1059.007, and the overall delivery mechanism is consistent with T1566.001.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9975

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://wastran.ru/uplcv?utm_term=notepad+end+of+line PDF link annotation
    • http://americasbestwingspa.iorderfoods.com/uploads/files/vabaresa.pdfIn PDF document text
    • https://wronba.pl/uploads/wysiwyg/file/91936177417.pdfIn PDF document text
    • https://profesa.net/userFilesfile/fagirika.pdfIn PDF document text
    • http://d-a-s.cn/userfiles/file/77571149453.pdfIn PDF document text
    • https://ezastupitelstvo.sk/editor_uploads/system/files/mivaluziruvafuxiloribujip.pdfIn PDF document text
    • http://criollo-cocoa.com/userfiles/file/vekejemaseresuzad.pdfIn PDF document text
    • http://mas.vacations/wp-content/plugins/formcraft/file-upload/server/content/files/161448dedc6661---nodoxaniwo.pdfIn PDF document text
    • https://wisestudentz.com/userfiles/file/4111924283.pdfIn PDF document text
    • http://perechen-jurnalov.ru/js/ckfinder/userfiles/files/92766449679.pdfIn PDF document text
    • https://brianhigbielaw.com/UserFiles/file/13107921623.pdfIn PDF document text
    • http://christopherspubandgrille.com/userfiles/files/xinifivevamigu.pdfIn PDF document text
    • http://sochisushi.nl/survey/userfiles/files/48506106854.pdfIn PDF document text
    • http://johnmarzillier.com/ckfinder/userfiles/files/nezesu.pdfIn PDF document text
    • https://petikdaun.com/contents/files/10971516579.pdfIn PDF document text
    • http://brezov-gaj.si/uporabnik/file/46031049805.pdfIn PDF document text
    • https://www.acta-mobilier.fr/ckfinder/userfiles/files/luxaw.pdfIn PDF document text
    • https://dialogueinpraxis.net/files/docs/simiven.pdfIn PDF document text
    • http://dc-07b6a75bc4d0.breakthrough-physical-therapy.com/userfiles/files/tigevarezozasozeronitu.pdfIn PDF document text
    • https://landtop.com/filespath/files/20210921120521.pdfIn PDF document text
    • http://rideco.hu/upload/file/9773531906.pdfIn PDF document text
    • https://empezo.xyz/js/ckfinder/userfiles/files/loweretopese.pdfIn PDF document text
    • http://kondicionery-vidnoe.ru/upload_picture/file/kinowisiwejajifidijure.pdfIn PDF document text
    • http://skolky.info/foto/images/file/2556530495.pdfIn PDF document text
    • http://sampoernastrategic.com/uploads/image/files/kakidonit.pdfIn PDF document text
    • 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_off0000d494.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD494 10200 bytes
SHA-256: d203cd96fb78648cbac38b273e8c8b01ff5f313bc3ecba730f03c837fad4f9ad
font_01_sfnt_off0000eb85.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEB85 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off00010397.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10397 17584 bytes
SHA-256: 622150fb9b85680cd5fba08c9bd14ef744381055827c55b8b3aece4eee09df5b