Malicious PDF — malware analysis report

Static analysis result for SHA-256 d6d3f80b96c84df7…

MALICIOUS

PDF

85.3 KB Created: 2021-03-22 00:08:51 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 49a8f8717e90a7c210019f7d376c2f5c SHA-1: 26d0c0cb7afc9a709044c2a3d2989f57bb8d424c SHA-256: d6d3f80b96c84df7ce0b7bad1a0606dd8fa2e0c1f0904f794d8d6851cd51a21a
156 Risk Score

Malware Insights

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

The PDF contains a large number of external links, many of which are disguised as legitimate documents, indicating a link farm or SEO poisoning tactic. The ClamAV detection and ML classifier strongly suggest malicious intent, likely related to phishing or malware distribution. Although no scripts were explicitly extracted, the PDF structure and heuristic firings point towards the exploitation of PDF vulnerabilities or social engineering to redirect users to malicious sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

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://resalured.ru/123?utm_term=asian+cup+2019+schedule+pdf
    • https://cdn.sqhk.co/nikazurokuv/jijfFja/29991404096.pdf
    • http://vavimaj.iblogger.org/bls_training_material.pdf
    • https://cdn.sqhk.co/seponidozit/iavxhbF/burejivez.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://www.daltonmaag.com/
    • https://8c77b9b7-c39b-43d6-9406-6086bd2c0f93.filesusr.com/ugd/ee6770_da6fc8d052f14711a7ee38320c0054be.pdf?index=true
    • https://d6aab468-caab-4d9e-910f-d3bf64ae4104.filesusr.com/ugd/5438e3_79c16a20f363446f94e19a531c49e833.pdf?index=true
    • https://457cefd1-268f-49c0-9ca4-ced5ac281e6b.filesusr.com/ugd/983758_9ebb9c7dfd1646b4b1557cec1c53754d.pdf?index=true
    • https://s3.amazonaws.com/jolituzoji/netupagurafotekutefexexiw.pdf
    • http://kudogal.rf.gd/54244686364.pdf
    • https://s3.amazonaws.com/timeziso/speak_novel_questions.pdf
    • https://3745348a-78a0-42d7-8ff4-af2b45bf5faf.filesusr.com/ugd/02631b_0a96a6f17bb84d2abe14daf75b7be1c7.pdf?index=true
    • https://s3.amazonaws.com/resisuna/tadij.pdf
    • https://ec8c99fd-5413-4e38-b6a0-2ccbba71fc6f.filesusr.com/ugd/de02f3_d6ca5c441e9740b38d70b7b99ef792f4.pdf?index=true
    • https://49432a94-54bc-4d13-9d12-ea41d731e1b8.filesusr.com/ugd/a7c689_9b389d0f275f4754a1a70ca9bb79b378.pdf?index=true
    • https://s3.amazonaws.com/wewuxuviwar/premiere_pro_download_free_for_pc.pdf
    • https://s3.amazonaws.com/fotojipifuzitul/sijij.pdf
    • https://s3.amazonaws.com/mipeboro/tizere.pdf
    • https://s3.amazonaws.com/tujeviwakirawu/kenwood_kvt-516_navigation_module.pdf
    • https://37bdae34-bb2f-403f-997c-54a7c09d9c06.filesusr.com/ugd/dc98cc_5c40c357a1a34fb9906cd59f12eb7956.pdf?index=true
    • https://0404cab7-c021-4537-be79-420bcb2f88cc.filesusr.com/ugd/52c240_05072952357a4cc1a49d139b3ee5b76a.pdf?index=true
    • https://cfecb619-c0f5-418d-ae9d-b1147643389f.filesusr.com/ugd/4cd51e_73d79256b1254345b65466b9537f55df.pdf?index=true
    • https://9764c975-acb6-4bd5-a3ff-b1f4624bc9bc.filesusr.com/ugd/5bcb7b_9d4a55da8d1842fd8a9cfffb34e0dd12.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

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00010273.bin
fdf608249cce0fa3546e8c5f7b0832d23fae0628c16a53df827938ed2dc8b80f		 pdf-font-stream PDF embedded font (sfnt) at offset 0x10273 5308 bytes
font_01_sfnt_off0001146e.bin
eff83a88f3dc36da19deeec20b812b60227153c2829add49113c596d6d05026b		 pdf-font-stream PDF embedded font (sfnt) at offset 0x1146E 11000 bytes
font_02_sfnt_off000139d2.bin
1062cd8ddf90f4344fa193b395386d5669df1a952e5759311ca261a71931f361		 pdf-font-stream PDF embedded font (sfnt) at offset 0x139D2 4324 bytes

Open this report in the interactive analyzer, or submit your own file for analysis.