Malicious PDF — malware analysis report

Static analysis result for SHA-256 2c87e876b91cda86…

MALICIOUS

PDF

69.1 KB Created: 2021-02-16 18:08:22 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-22
MD5: 00f77418d4166b1e5da89297149804d5 SHA-1: 24cf7c6df67d61587ca27582fecbd5e8ef5be9db SHA-256: 2c87e876b91cda86f1a54eff8b9cd9d88144c3b27588897534c92833622187d2
156 Risk Score

Malware Insights

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

The PDF file contains numerous external links, many pointing to Weebly-hosted PDF files, suggesting a link farm or phishing attempt. The ML classifier and ClamAV detection strongly indicate malicious intent. The document body, though heavily obfuscated, appears to be a lure related to satellite communication, likely intended to direct users to malicious sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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 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.
  • 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://bologen.ru/strik?utm_term=what+are+the+uses+of+satellite+communication PDF link annotation
    • https://jerusofiv.weebly.com/uploads/1/3/0/9/130969981/wofofonab.pdfIn PDF document text
    • https://rasafidi.weebly.com/uploads/1/3/0/7/130776861/dozafu_gelatufafo_jodazujejiwakaz.pdfIn PDF document text
    • https://kelebewo.weebly.com/uploads/1/3/4/3/134359650/vudoxafezusewurosewe.pdfIn PDF document text
    • https://cdn.sqhk.co/sejejajoxej/hjYgcia/javojaxadiwimezexasaju.pdfIn PDF document text
    • https://lekofubazag.weebly.com/uploads/1/3/1/8/131872104/zujatufu.pdfIn PDF document text
    • https://dunomomavelow.weebly.com/uploads/1/3/1/4/131407267/kudivuvuvi_larixu.pdfIn PDF document text
    • https://dopotalufiru.weebly.com/uploads/1/3/4/6/134601398/ca27e9d24e992.pdfIn PDF document text
    • https://cdn.sqhk.co/sizozizaj/BDpohio/download_stickman_rope_hero_mod_apk_android_1.pdfIn PDF document text
    • http://sanadewa.iblogger.org/onbind_example_android.pdfIn PDF document text
    • https://cdn.sqhk.co/komajekolino/MjexbPV/crusaders_quest_tier_list_korean.pdfIn PDF document text
    • https://cdn.sqhk.co/delojiwuguj/7y1igj1/dr_kongara_baton_rouge_la.pdfIn PDF document text
    • https://muzezibabut.weebly.com/uploads/1/3/0/7/130739211/refesujemufuv.pdfIn PDF document text
    • https://rogupogadagome.weebly.com/uploads/1/3/1/3/131398605/9f6d1a792.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/ginutu/kuratitalawaban.pdfIn PDF document text
    • https://s3.amazonaws.com/bulozor/argus_monitoring_software_manual.pdfIn PDF document text
    • http://nimetegukixiz.rf.gd/vonexujolemo.pdfIn PDF document text
    • https://s3.amazonaws.com/fedure/abc_freeform_app.pdfIn PDF document text
    • https://s3.amazonaws.com/nisoxow/28584535962.pdfIn PDF document text
    • http://gaxodusipif.epizy.com/bcbs_il_medicare_prior_authorization_form.pdfIn PDF document text
    • https://s3.amazonaws.com/zuses/dezogomujebojonejufipez.pdfIn PDF document text
    • https://s3.amazonaws.com/bezutu/72766334366.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_off0000d255.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD255 5136 bytes
SHA-256: b903947bf5705bf24eddf55c020f4fe4ae6c5265878e350fc4998ffaa370f108
font_01_sfnt_off0000e3ac.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE3AC 10324 bytes
SHA-256: 10b26d7002797f825529334ad559a3046ee910a54acdc58375f28e8b161411fe

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