Malicious PDF — malware analysis report

Static analysis result for SHA-256 6792986a3719f54d…

MALICIOUS

PDF

79.6 KB Created: 2021-03-03 05:28:38 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-26
MD5: b90e42ec4e4b0b02cfe19accb3e0df9a SHA-1: 44ed69e0a3475a131f913b5acdb97cb668adec39 SHA-256: 6792986a3719f54de0d7ea264f5be5a73c407a2ee0a85255af9b2f6e2921dd8d
156 Risk Score

Malware Insights

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

This PDF file was identified as malicious by multiple heuristics and ClamAV, indicating a phishing or malware distribution attempt. The PDF contains a large number of external links, many pointing to potentially malicious domains, suggesting a link farm or redirection mechanism. The embedded URLs are likely used to download second-stage payloads or redirect users to phishing sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://xezojetit.ru/aws?utm_term=ap+spanish+literature+multiple+choice+practice PDF link annotation
    • http://svoydvalend.xyz/27450012287odqa3.pdfIn PDF document text
    • https://gegovowazuravas.weebly.com/uploads/1/3/1/3/131398401/bifevunapopajemu.pdfIn PDF document text
    • https://cdn.sqhk.co/xewazezikufi/idgiSgi/square_bird_feeder_pole.pdfIn PDF document text
    • https://jitivafume.weebly.com/uploads/1/3/0/9/130969372/fewazatenutimofeje.pdfIn PDF document text
    • https://tipuzivi.weebly.com/uploads/1/3/0/9/130969377/fagaforoxok.pdfIn PDF document text
    • http://silver35.ru/ps4_date_de_sortieg8dbs.pdfIn PDF document text
    • https://vugevosuza.weebly.com/uploads/1/3/5/3/135328642/7348199.pdfIn PDF document text
    • https://bujakisuka.weebly.com/uploads/1/3/2/6/132695398/1707555.pdfIn PDF document text
    • https://tevumusavobe.weebly.com/uploads/1/3/4/1/134108657/pugugedorozopil.pdfIn PDF document text
    • https://defiduzumuxel.weebly.com/uploads/1/3/2/6/132682342/4ba5e2120f.pdfIn PDF document text
    • http://digitalmedialit.com/22685788968mm82g.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/miledu/76218898411.pdfIn PDF document text
    • https://s3.amazonaws.com/rujabepifar/tubafotarazenipej.pdfIn PDF document text
    • https://s3.amazonaws.com/kodipopujufipig/37425437148.pdfIn PDF document text
    • https://s3.amazonaws.com/zubata/43167058885.pdfIn PDF document text
    • https://s3.amazonaws.com/tuletivotarupu/ho_chi_minh_city_tourism_report.pdfIn PDF document text
    • https://s3.amazonaws.com/winumigutam/how_hard_is_physics_1_ap_test.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_off0000f8c9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF8C9 5164 bytes
SHA-256: a8fdfd9466ae4e96b871f37ebec07d529f790b6ed5accb2ab426a3447615d54d
font_01_sfnt_off00010a2b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10A2B 11848 bytes
SHA-256: 4db69dba6d699c0edf7a254714a61ee1359433f5e1933dc29e783fa1a4ce0158

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