Malicious PDF — malware analysis report

Static analysis result for SHA-256 9de29242549fa84a…

MALICIOUS

PDF

85.9 KB Created: 2021-03-18 20:00:36 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-21
MD5: f8865babda58b55c0c72b23f2b0818e8 SHA-1: c92ed20ad308c14c0a2e7b05ed8823da033eae2b SHA-256: 9de29242549fa84aeee00845736259668d540e136470ac3184e3dac263dd4205
194 Risk Score

Malware Insights

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

The PDF contains a large number of external links, many hosted on disposable domains, indicating a link farm or phishing lure. The ML classifier and ClamAV detection strongly suggest malicious intent, specifically phishing or trojan activity. While no scripts were extracted, the PDF structure and numerous external URIs point towards an attempt to redirect users to malicious sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9991

Heuristics 7

  • 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.
  • 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.
  • Urgency / deadline lure low SE_URGENCY_LURE
    Document contains urgency or deadline language ('account will be terminated', 'action required within 24 hours', etc.) — useful context, but low-signal without other findings
  • 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://jottigo.ru/award?keyword=alagappan+medicine+5th+edition+pdf PDF link annotation
    • http://fopasezexelori.iblogger.org/87369722648.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://a2876ee3-c470-454a-91e2-e108d831033a.filesusr.com/ugd/e8dba5_770096a4d6f34331aec22b107519990a.pdf?index=trueIn PDF document text
    • https://1261df91-4e32-40b2-8b8a-4050d3c54cbb.filesusr.com/ugd/df69c1_49f1473ff3c64005b007afa85f3e868e.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/3455a497-ddde-4782-8c0a-30c67bc8ab2a/fopujidanavonulolajibuf.pdfIn PDF document text
    • https://s3.amazonaws.com/fonazuzixagizir/48844577041.pdfIn PDF document text
    • https://d21da297-2d1c-4020-882f-059d99c29dc9.filesusr.com/ugd/3724a2_54327ca54b5946cabd623625a9f9db2c.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/19eb9e1b-0300-42de-a39c-3bae78088239/vaporirujaf.pdfIn PDF document text
    • https://d872ce2a-2baf-4032-ab86-ab75b2f66d52.filesusr.com/ugd/338562_b11a24b9dfee4bffb65918972473c793.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/84ffa09a-faa6-497d-b711-6b60dbd90c27/the_summer_i_turned_pretty_tv_series.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/754f9607-158a-4ab7-90df-e9cd759aa5b7/how_to_program_viper_auto_start.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/5b50e998-41e3-489b-b46f-a2d2ac319e11/jujofedoluvazikepokad.pdfIn PDF document text
    • http://rozizibuno.epizy.com/29166303138.pdfIn PDF document text
    • https://s3.amazonaws.com/gurowozenupifi/xulifolirusese.pdfIn PDF document text
    • https://s3.amazonaws.com/xijalovelokolep/argument_from_sufficient_reason.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/60468230-91d2-42db-9916-43696dd144dc/5344909507.pdfIn PDF document text
    • https://c064424b-11a8-4e39-a524-24a74bcd733d.filesusr.com/ugd/54e393_7971a1835b94418d90fe1f57baaa0ecb.pdf?index=trueIn PDF document text
    • https://f1801c53-b3f5-4b94-a9b3-4bb8eb376a66.filesusr.com/ugd/af633f_41d4e04f450841ab8be4d7ecd00298d2.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/427a3543-3dc2-45a3-bc30-ef1603285e3b/how_to_hard_reset_flip_video_camera.pdfIn PDF document text
    • https://2a4c341d-9af7-4f89-b48a-1b926ad6ced7.filesusr.com/ugd/dd6616_8e2ae345246a46cc816cf296d947919a.pdf?index=trueIn PDF document text
    • https://68e1e3d4-268d-49bc-a8aa-b119cb10fea7.filesusr.com/ugd/3ceeb9_324b5710a4b04827afbf44aa1a902be6.pdf?index=trueIn PDF document text
    • https://b00f38ea-0d13-4519-ab0f-1253f0d03ca0.filesusr.com/ugd/289c5e_f519b8c8a62a4afba46ab95bd55aaad0.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/1ee5ccec-eddc-400b-a5e9-4cbdbb12b5ad/how_many_characters_are_in_percy_jackson.pdfIn PDF document text
    • http://vipuwizu.epizy.com/dance_monkey_song_free.pdfIn PDF document text
    • https://s3.amazonaws.com/vinejivunitego/apk_traffic_rider_mod_unlimited.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

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00011288.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11288 5408 bytes
SHA-256: 4c8a70175d939fed5be653f497879f08facda3486d476aba297c595b1a9db547
font_01_sfnt_off000124d6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x124D6 10844 bytes
SHA-256: a7458227f51ffbe11fff9ee0de27c191b701c23b00015d469aadb24c6aa5f022