Malicious PDF — malware analysis report

Static analysis result for SHA-256 f9ac126e0bd60ad3…

MALICIOUS

PDF

80.7 KB Created: 2021-03-19 20:23:32 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 6a8ac91785314e1eb72bd424cbdba43e SHA-1: d5b0b3ae40b4414e3e72e61032807393c1a03ff9 SHA-256: f9ac126e0bd60ad3a44953e85b5237240842f17144c7c78c586e48cfe8d5c814
156 Risk Score

Malware Insights

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

The PDF file contains numerous external links, with one prominent URL suggesting a lure related to 'irctc ticket booking form pdf'. The heuristic 'PDF_SEO_LINK_FARM' indicates a large number of links, likely for SEO manipulation or to distribute malicious content. ClamAV detection and ML classification confirm the malicious nature of the file, pointing towards a phishing or trojan distribution scheme.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 5

  • 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.
  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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://leonvi.ru/award?keyword=irctc+ticket+booking+form+pdf
    • https://tuxibefogeja.weebly.com/uploads/1/3/4/3/134359070/parab_rumatiwikirat_dokevazizete.pdf
    • https://cdn.sqhk.co/wiparodub/kPiejhV/gugulajuba.pdf
    • http://piwifeg.22web.org/asme_b16_5_flange_dimensions.pdf
    • https://cdn.sqhk.co/nizivatitogu/9bsagjK/fruit_picking_near_me.pdf
    • https://laximazerafa.weebly.com/uploads/1/3/4/2/134235816/zawudaginawoda_jifuwugopol.pdf
    • https://zajilonuxiwez.weebly.com/uploads/1/3/4/8/134871265/fe4b4b07.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://uploads.strikinglycdn.com/files/3e2230ae-6e3b-49d2-8e0e-fbfa56d104ad/seo_for_dummies_2019.pdf
    • http://vimitafukufes.rf.gd/ableton_live_lite_tutorial.pdf
    • https://03df18d0-0a94-4077-8b44-1f3cf8b7c870.filesusr.com/ugd/23a6c3_173ab741e46347fbb6f2fb8be6f82601.pdf?index=true
    • http://ninonasoligu.rf.gd/causality_assessment_of_adr.pdf
    • https://uploads.strikinglycdn.com/files/8fe41272-24a1-4bba-a191-68c12b79595c/woledoxegubozotine.pdf
    • https://uploads.strikinglycdn.com/files/fb3706d0-73c5-4d08-8302-80004d99c0e1/28720772385.pdf
    • http://luwegovufa.epizy.com/zetusujaberevejurudezo.pdf
    • https://63aa7d51-6c54-48cc-ac87-b710a0da19c3.filesusr.com/ugd/c8d394_46ca8e8aa2e84bb99911702ce571c482.pdf?index=true
    • https://uploads.strikinglycdn.com/files/24a82b3f-032f-4667-97db-e552d51d7c04/how_much_should_i_pay_for_a_2020_camry_le.pdf
    • http://bavidatesudujig.epizy.com/berlin_blockade_worksheet.pdf
    • https://uploads.strikinglycdn.com/files/3a133302-6a05-49f7-9a8f-1a39ac885663/guitar_barre_chords_chart.pdf
    • https://73c25812-7308-4b32-b985-10e2a25710ca.filesusr.com/ugd/5b604d_b7eb8fc4a0eb4ee09d240d2d6a947579.pdf?index=true
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/
    • http://scripts.sil.org/OFL
    • http://dejavu.sourceforge.net
    • http://dejavu.sourceforge.net/wiki/index.php/License

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000eaa1.bin
c9e6b49f5cee5317662153a406d0a96261559b565073ffaef01706b50e0e5169		 pdf-font-stream PDF embedded font (sfnt) at offset 0xEAA1 5196 bytes
font_01_sfnt_off0000fc40.bin
56e3ebb7f127008e14cfc0c8cb94487ca167c928d9d3e638f6b3850e8e739af7		 pdf-font-stream PDF embedded font (sfnt) at offset 0xFC40 10736 bytes
font_02_sfnt_off0001211c.bin
52db30b66cfb76898988bc7c6ed152514c301740808ab95bec9c68e49df23550		 pdf-font-stream PDF embedded font (sfnt) at offset 0x1211C 16036 bytes

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