Malicious PDF — malware analysis report

Static analysis result for SHA-256 30d1ba8868de4295…

MALICIOUS

PDF

80.9 KB Created: 2021-03-23 01:17:56 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-22
MD5: 4ace6d2db2e9a1f63caaf11e503511f1 SHA-1: ec993d065419b2a30904a712b1c8963ba6f51143 SHA-256: 30d1ba8868de4295c494ec2c64fc5a3672794ff3d24c5d1790f7408a5093a730
164 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF contains numerous external links, many pointing to suspicious domains, and is flagged by ML classifiers and ClamAV as malicious. The heuristic 'PDF_SEO_LINK_FARM' indicates a large number of external links, suggesting a link farm or phishing attempt. The presence of embedded URLs and the overall structure strongly suggest this document is designed to redirect users to malicious sites, likely for phishing or to download further malware.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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 contains mass external PDF link farm critical PDF_SEO_LINK_FARM
    Small PDF contains many clickable external PDF links, mostly clustered on one host. This matches generated SEO/link-farm PDF carriers used to route users into malicious or unwanted-software delivery chains, rather than a normal document citation pattern.
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • 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://xajibur.ru/123?utm_term=free+crystal+reports+viewer+online PDF link annotation
    • https://pasezarovatif.weebly.com/uploads/1/3/4/8/134858127/f822534a8dc5.pdfIn PDF document text
    • http://julivojurukumu.sportsontheweb.net/zowikasus.pdfIn PDF document text
    • https://cdn.sqhk.co/xagegegozi/hrhaha8/nopijojuni.pdfIn PDF document text
    • https://cdn.sqhk.co/mevutaxisut/hhIcEgc/guided_reading_level_step_sister.pdfIn PDF document text
    • http://chambreop.xyz/13110216053n9ik0.pdfIn PDF document text
    • http://motarojetox.sportsontheweb.net/lafevavuj.pdfIn PDF document text
    • https://fiwisito.weebly.com/uploads/1/3/4/7/134715438/romafezukedewuz.pdfIn PDF document text
    • http://b2b-servis.ru/jivoxezajajojusasababid7xgk.pdfIn PDF document text
    • http://sogixusi.medianewsonline.com/music_arranging_and_orchestration_john_cacavas.pdfIn PDF document text
    • https://wobereresexo.weebly.com/uploads/1/3/1/6/131606335/7ac3f.pdfIn PDF document text
    • http://xizugef.medianewsonline.com/microbiologia_bsica_bacteriologia.pdfIn PDF document text
    • https://faxusonugavipil.weebly.com/uploads/1/3/4/7/134741565/wusozesajexariw.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/nuselufuzo/rogujukixesipado.pdfIn PDF document text
    • https://s3.amazonaws.com/wowonesoribu/boroj.pdfIn PDF document text
    • http://wobanunep.myartsonline.com/andante_lenguaje_musical_primer_curso_gratis.pdfIn PDF document text
    • https://s3.amazonaws.com/vonusirukete/cecelia_ahern_books_free.pdfIn PDF document text
    • https://s3.amazonaws.com/bulolimepol/vemidosagovenimi.pdfIn PDF document text
    • https://s3.amazonaws.com/tobito/71871743738.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://scripts.sil.org/OFLIn 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_off0000e76b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE76B 5136 bytes
SHA-256: 11439ffce720f2ca15b4c9667e5fc5f20241c5685ae5f9a08ea3509bb7b18827
font_01_sfnt_off0000f916.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF916 11868 bytes
SHA-256: 49d67d36d1ca6adfc80da19258fcfa896648db4073ed470307d67b3a748248b7
font_02_sfnt_off0001213c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1213C 16204 bytes
SHA-256: 541fa2b6826b0add99b7d5a173ef1e6a5567607b5192f75b810eb17d6a563501

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