Malicious PDF — malware analysis report

Static analysis result for SHA-256 ed3e9bd1735c215d…

MALICIOUS

PDF

73.1 KB Created: 2021-01-03 11:30:24 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-07
MD5: 4c2bf92871681eec3f568ce244196917 SHA-1: 0ae75a173b03e53bd3ae689be08934889bd4c6cc SHA-256: ed3e9bd1735c215dbd5deab3e06d21db31bf3f5d289fe4739a968a6665205294
214 Risk Score

Malware Insights

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

The PDF contains a large number of embedded links, many of which point to known malicious redirectors or are part of a link farm designed to manipulate search engine results. The ClamAV detection and ML classifier strongly indicate malicious intent, likely phishing or malware distribution. No scripts were extracted, but the embedded links are the primary attack vector.

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
  • PDF links to known malicious redirector infrastructure critical PDF_MALICIOUS_REDIRECTOR_LINK
    PDF contains a clickable URI to redirector infrastructure used by a known malicious PDF SEO/adware delivery campaign. These documents typically rely on user interaction and redirect chains rather than a PDF parser vulnerability.
  • 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.
  • 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://traffine.ru/aws?utm_term=philadelphia+zoning+map+pdf In PDF document text
    • https://cdn.sqhk.co/wuvupalib/gceQMjj/fall_guys_mobile_gameplay.pdfIn PDF document text
    • https://kasuvimifimo.weebly.com/uploads/1/3/1/6/131637099/930bb5448.pdfIn PDF document text
    • https://sifajovu.weebly.com/uploads/1/3/4/8/134874608/vaxuvuniser.pdfIn PDF document text
    • https://cdn.sqhk.co/xupotuferu/hahegcr/my_little_star_vip_idol_maker.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4368478/normal_5fef168c6cf5e.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/poresi/lagu_nineball_aku_jatuh_cinta.pdfIn PDF document text
    • https://s3.amazonaws.com/novifamigot/town_of_salem_town_points.pdfIn PDF document text
    • https://s3.amazonaws.com/vavebufevodutob/gnarls_barkley_crazy_piano_sheet.pdfIn PDF document text
    • https://s3.amazonaws.com/nitajosasa/pugipel.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/89f4c952-1762-47c1-be06-0699c6eea02b/windows_7_usb_tool_we_were_unable_to_run_bootsect.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/c8e0bd15-c028-40ac-939e-ec569b796038/demon_slayer_rpg_2_wiki.pdfIn PDF document text
    • https://s3.amazonaws.com/dewazewokib/xamitin.pdfIn PDF document text
    • https://s3.amazonaws.com/kefiperizonofu/85315661699.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/0a62345c-be96-4fac-9f87-b47d80afab72/blaze_black_2_pokemon_locations.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/1d1a5d25-a886-4033-8fab-a923b2f4e5e6/dropbox_ventajas_y_desventajas.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/a3435188-d4a8-4c20-95f8-a6a7a69d339d/bimoselojekasetif.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_off0000e09b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE09B 5232 bytes
SHA-256: be4a5712b16a37a0ea18bfe3c18a5d2af3879e0d9d0fadf2cf93b582a321055a
font_01_sfnt_off0000f257.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF257 11080 bytes
SHA-256: 2ad3c33afcc1095961f3cfe821a1a9e032518274607dd22c3fcdb2f955840027

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