Malicious PDF — malware analysis report

Static analysis result for SHA-256 5b402ef80227a96b…

MALICIOUS

PDF

69.5 KB Created: 2021-09-19 16:52:58 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-23
MD5: 4f085a1403101ba4a9426589d5ce179e SHA-1: 5ec67c283979ab16c562af4e8ee1258a2ab736c0 SHA-256: 5b402ef80227a96be86e2685b87c6ed1875ed4eb40f384097058f599f8acb13f
146 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF is identified as a phishing lure due to its image-only nature and embedded action trigger, typical of a screenshot disguised as a document. It contains numerous links to potentially malicious domains, suggesting an attempt to redirect users to phishing sites or download further malware. The ML classifier and ClamAV detection strongly indicate malicious intent.

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
  • Image-only document with action trigger (screenshot lure) medium PDF_IMAGE_LURE
    PDF has 1 image(s), only 0 text block(s), carries a click-outward action, and is only 69 KB — typical shape of a phishing lure where a full-page screenshot hides a clickable button that launches or submits to an attacker URL.
  • 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.
  • 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://oniceh.ru/uplcv?utm_term=gta+san+andreas+cheats+for+pc+pdf PDF link annotation
    • https://wietsevoermans.nl/ckfinder/userfiles/files/laridamenenusafu.pdfIn PDF document text
    • http://soosanfix.com/upload/fckeditor/file/pijetubatimakasuwodo.pdfIn PDF document text
    • https://aksukartela.com/images_upload/files/22708130662.pdfIn PDF document text
    • https://www.orthovision-lublin.pl/ckfinder/userfiles/files/jubudononavesojutumi.pdfIn PDF document text
    • http://giga.sk/storage/file/58461163614.pdfIn PDF document text
    • http://vlajkylevne.cz/UserFiles/File/40675977068.pdfIn PDF document text
    • http://tahi.hu/ckfinder/userfiles/files/jagarudabujitojemalebofok.pdfIn PDF document text
    • http://votejoedestefano.com/editorData/file/12493334140.pdfIn PDF document text
    • http://www.scenekunstskolen-efteruddannelsen.dk/ckfinder/userfiles/files/32487152361.pdfIn PDF document text
    • http://ceramicaartisticamarsalese.it/userfiles/files/ropeforelelem.pdfIn PDF document text
    • https://sensesgrouphk.com/louis/STARKGROUP/ckfinder/userfiles/files/gavadibujatimubomajojiz.pdfIn PDF document text
    • https://remini.hu/userfiles/file/butirijegoxovevoza.pdfIn PDF document text
    • http://signauction.net/userfiles/file/denupenin.pdfIn PDF document text
    • http://basyapiemlak.com/yukleme_klasoru/userfiles/file/6234289777.pdfIn PDF document text
    • https://jobtiara.com/files/files/18984198465.pdfIn PDF document text
    • http://drvision.org/wp-content/plugins/formcraft/file-upload/server/content/files/161374619ca341---falafevafo.pdfIn PDF document text
    • http://www.lavalledesign.com/wp-content/plugins/formcraft/file-upload/server/content/files/16138da419c602---91428522418.pdfIn PDF document text
    • http://buyo-g.net/userfiles/file/56109389334.pdfIn PDF document text
    • http://phutungotodungha.com/img/files/97027406182.pdfIn PDF document text
    • http://shiokuda1.com/contents/files/56772075573.pdfIn PDF document text
    • http://2safe4u.cz/UserFiles/File/sudebezisajurepinoti.pdfIn PDF document text
    • http://marikitaberbagi.com/userfiles/file/gugalamugeberun.pdfIn PDF document text
    • https://garraldaarquitectura.com/garralda_userfiles/files/wodakimogoxotarigawidi.pdfIn PDF document text
    • https://motelandratecuci.ro/userfiles/file/fowuminumiwosokagiz.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_off0000b3db.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB3DB 14392 bytes
SHA-256: 531575db0ade90be2ab6fb182790e290d5e33597d0c45bed645efaf865c565cc
font_01_sfnt_off0000d7dc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD7DC 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off0000eff3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEFF3 10616 bytes
SHA-256: 6b1143e3e2b7bfbeecab1f7717a84a2a506992d22d22a41729d2b2ad4f1c7201