Malicious PDF — malware analysis report

Static analysis result for SHA-256 39c1160895dbe97a…

MALICIOUS

PDF

64.5 KB Created: 2021-03-09 04:22:15 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-17
MD5: f517a1e05502a0c9682831a856214741 SHA-1: a95ca1f196f72c551a5dee87a4f53cd98a557607 SHA-256: 39c1160895dbe97aa8e40ce38406768541d1e9a0b5dfb92a7d3904016646f469
284 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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
  • 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.
  • Password-protected archive handoff high SE_PASSWORD_ARCHIVE_LURE
    Document gives password instructions for an archive or attachment — often used to keep payloads encrypted until after gateway scanning
  • 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.
  • 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://dafemum.ru/123?utm_term=ddu+gky+guidelines In PDF document text
    • http://hisgohar.site/smegma_makes_her_gag64ps6.pdfIn PDF document text
    • https://jarufepijup.weebly.com/uploads/1/3/0/7/130776730/4698371.pdfIn PDF document text
    • https://sejirefado.weebly.com/uploads/1/3/4/6/134682993/fedixoze.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4385235/normal_5fe81757d72d3.pdfIn PDF document text
    • https://rizomoxus.weebly.com/uploads/1/3/4/5/134589692/momav.pdfIn PDF document text
    • https://xowasesulozuvuv.weebly.com/uploads/1/3/5/3/135347394/2872328.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4412388/normal_6034f36def069.pdfIn PDF document text
    • https://dopotalufiru.weebly.com/uploads/1/3/4/6/134601398/desejo.pdfIn PDF document text
    • http://poroda.site/18542432949hu934.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://uploads.strikinglycdn.com/files/50bba394-6e39-4e65-b901-b3ab2c568889/western_snow_plow_parts_store_near_me.pdfIn PDF document text
    • https://s3.amazonaws.com/bipepezuwed/cangia_cangia_tue_voglie.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/d273ee4e-a1fc-4bf9-a799-28ae4380b71d/sodastream_source_black_white_with_flavours_source.pdfIn PDF document text
    • https://s3.amazonaws.com/sagotomagin/cnet_s_windows_10.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/31cd59e0-a60b-4d11-8548-ab456ac34663/five_nights_at_freddys_game_download_pc.pdfIn PDF document text
    • https://s3.amazonaws.com/kugelilizibuwum/dte_energy_report_outage_number.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_off0000c19f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC19F 4852 bytes
SHA-256: 03c08cca4012aae86e01ffaa6ccbf14a1e90716e477f23c877e54851074f270e
font_01_sfnt_off0000d250.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD250 10384 bytes
SHA-256: b166cddeee293c8b95b3e450708eef779644fa5b23c7145dc5869c3064492949