Malicious PDF — malware analysis report

Static analysis result for SHA-256 1c2309470c073aa5…

MALICIOUS

PDF

81.5 KB Created: 2021-09-21 06:07:13 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-27
MD5: 05422b38094667903fa10020eb400d22 SHA-1: 8bc0ec0d18c0d7d749b5ac662e1ff5f020a43320 SHA-256: 1c2309470c073aa5dc6068e231bda1a6d31f29c226b139394319ff9639c7e8c7
126 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains numerous external URLs, many hosted on disposable domains, indicating a link farm designed to redirect users. Heuristics like 'PDF_SEO_DISPOSABLE_LINK_FARM' and 'ML_NYX_PDF_MALICIOUS' strongly suggest malicious intent, likely phishing or malware delivery. ClamAV detection as 'Pdf.Phishing.Trojan' further supports this assessment.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9977

Heuristics 5

  • 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.
  • 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://drafthe.ru/uplcv?utm_term=y+se+shuru+hone+wale+word PDF link annotation
    • http://valsadindustries.com/userfiles/file/geluzoxatabopibolux.pdfIn PDF document text
    • https://digireg.li/upload/45252888491.pdfIn PDF document text
    • http://ityab.com/cache/fck_files/file/10363683655.pdfIn PDF document text
    • https://rinducm1.com/contents/files/sabetu.pdfIn PDF document text
    • https://y3stwk65l-mn9.com/contents/files/xojiforoxefepafufi.pdfIn PDF document text
    • http://www.salpasafarit.fi/tiedostot/files/ginezunimagodipebigow.pdfIn PDF document text
    • http://gangwonbnb.com/FileData/ckfinder/files/20210913_B41B061F2F77CA8B.pdfIn PDF document text
    • http://gingerwooddesign.com/wp-content/plugins/formcraft/file-upload/server/content/files/16148728a83863---53875654251.pdfIn PDF document text
    • http://krakow4you.pl/krakow/files/33688212946.pdfIn PDF document text
    • http://de-ko-gmbh.com/ckfinder/userfiles/files/fajogotepiwewek.pdfIn PDF document text
    • http://apexnepaltravel.com/userfiles/file/59392582332.pdfIn PDF document text
    • http://gestioniarmatoriali.it/40839096616.pdfIn PDF document text
    • https://volandovia.it/public/fileeditor/file/48856936096.pdfIn PDF document text
    • https://salonrewards.ca/images/file/legoza.pdfIn PDF document text
    • http://tantusmarina.com/UserFiles/file/67631970274.pdfIn PDF document text
    • http://qualityfirstservices.pro/testingsites/advantage_aviation/assets/media/file/jusafolamawilifuz.pdfIn PDF document text
    • http://ailizia.com/userfiles/voxudimavub.pdfIn PDF document text
    • https://mimpiindah168.com/contents/files/xukumaguwotuwagazi.pdfIn PDF document text
    • https://detector-billetes.com/Imagenes/file/pisogizigopuxev.pdfIn PDF document text
    • https://atputasbazes.lv/images/userfiles/files/83252967433.pdfIn PDF document text
    • https://grandiosieventinuziali.it/filesUploads/file/90494356852.pdfIn PDF document text
    • http://jplus-ag.com/upload/files/BodyFile__613E3DBB430B1.pdfIn PDF document text
    • http://freemansphotography.com/wp-content/plugins/formcraft/file-upload/server/content/files/1614838495d23b---fapinapunitekajerapesewax.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_off0000cff2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCFF2 21548 bytes
SHA-256: a41072a354a2ae7f2739bd82e709c51862eb14af025f005800fb6e6841ff4d67
font_01_sfnt_off000108f8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x108F8 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off0001210f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1210F 10324 bytes
SHA-256: 9c3f21d81eb568f072377bef5ce709a37d39a8802d18ed1d39f1d15c1a3bba75

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