Malicious PDF — malware analysis report

Static analysis result for SHA-256 2011cacbf9095226…

MALICIOUS

PDF

76.0 KB Created: 2021-03-01 07:11:22 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: a6721076abd3076534a933c7f471335e SHA-1: b62813f0b1f84f68581f4cb1d611b2bd6c3e4573 SHA-256: 2011cacbf90952262f1234daa5ee853098b1d4b04fcdfd7227c0c8b85410fb57
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 hosted on free web hosting services, suggesting a link farm or phishing attempt. The ClamAV detection and ML classifier strongly indicate malicious intent, likely related to phishing or malware distribution. Although no scripts were explicitly extracted, the PDF structure and numerous external URIs are indicative of malicious activity.

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://soxebez.ru/aws?utm_term=how+to+replace+battery+in+plantronics+headset
    • https://dubujede.weebly.com/uploads/1/3/4/6/134607356/6bb8542a7d.pdf
    • https://cdn.sqhk.co/puxolika/hajgheB/29361814264.pdf
    • http://tosefabebiribow.scienceontheweb.net/rijowonapumanolix.pdf
    • https://cdn.sqhk.co/bezakebijuk/j0tbVWC/when_does_fall_2020_start_ucf.pdf
    • https://cdn.sqhk.co/samekikogeri/hdrOhiA/call_simulator_momo_pranks.pdf
    • https://lodokevez.weebly.com/uploads/1/3/4/4/134476034/5915675.pdf
    • https://cdn.sqhk.co/narulaloro/jd7JgiP/line_graph_in_excel_with_multiple_lines.pdf
    • http://pedumerik.sportsontheweb.net/how_to_open_paint_using_run.pdf
    • https://cdn.sqhk.co/jorisuzil/bbgeIsc/falling_lyrics_harry_styles_chords_piano.pdf
    • https://mefupajudeto.weebly.com/uploads/1/3/4/8/134883840/wovametuzusim_bolapodasizi.pdf
    • https://cdn.sqhk.co/jawuraxexije/A4ha0r4/26836587167.pdf
    • http://9gusevshop.website/85308458180dxivm.pdf
    • http://fukuzowi.sportsontheweb.net/the_shack_restaurant_dublin_menu.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://dujepuxa.rf.gd/policy_guideline_template.pdf
    • http://naburonip.myartsonline.com/88182466709.pdf
    • http://womawujun.atwebpages.com/97658445127.pdf
    • http://fezigaf.epizy.com/rujewuseperaro.pdf
    • http://laxunuwozen.epizy.com/48160956157.pdf
    • 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 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000ecc8.bin
4ba7a1ef138dcd513a5c01de71a56aa5c43335c638c7b2eeaafc8c2a3ec50731
pdf-font-stream PDF embedded font (sfnt) at offset 0xECC8 5456 bytes
font_01_sfnt_off0000ff54.bin
143702874a0c17feacfbf53202cb8a6789e013f2a96705dc422a8f3ee0b402f5
pdf-font-stream PDF embedded font (sfnt) at offset 0xFF54 10364 bytes