Malicious PDF — malware analysis report

Static analysis result for SHA-256 cb719078ee7a2166…

MALICIOUS

PDF

75.2 KB Created: 2021-06-06 07:47:26 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-24
MD5: 4bcabf386078c527f05d7d5a336f625c SHA-1: c9f9e721977f5aec7ab28178d27db610539f8784 SHA-256: cb719078ee7a21663551b3cc47bd31e76799cca07c2b0b7c499073a9a163b10e
186 Risk Score

Malware Insights

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

This PDF document was flagged by multiple heuristics as malicious, including a critical ClamAV detection for Pdf.Phishing.Trojan. The presence of a large number of external links, many on disposable hosting, suggests a link farm designed to redirect users to malicious sites. The document body contains garbled text but includes a URL that appears to be a lure for free downloads, indicating a potential phishing or malware distribution attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9990

Heuristics 6

  • 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.
  • 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.
  • 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://crysiq.ru/pbw?utm_term=iphone+marimba+ringtone+mp3+download+free PDF link annotation
    • https://mojipolizu.weebly.com/uploads/1/3/4/3/134318612/204127.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4451356/normal_5fd1ece09f58b.pdfIn PDF document text
    • https://dajukufatob.weebly.com/uploads/1/3/4/3/134345308/wujafepazisan.pdfIn PDF document text
    • https://jugunita.weebly.com/uploads/1/3/4/4/134440710/zunakuwubifavinag.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4530070/normal_5fd7b7b05029b.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4482623/normal_602b0f5e7b34a.pdfIn PDF document text
    • https://gapemudumowew.weebly.com/uploads/1/3/1/4/131437765/damanabot_fuwetawoleko.pdfIn PDF document text
    • https://farunigi.weebly.com/uploads/1/3/4/7/134716297/lewonomedot_jibupu_feripolatij.pdfIn PDF document text
    • https://wofixoxabovu.weebly.com/uploads/1/3/4/5/134524794/908644.pdfIn PDF document text
    • https://denumojadiribik.weebly.com/uploads/1/3/4/0/134042792/ronexulivodep_pamutawavo.pdfIn PDF document text
    • https://towowiwegopute.weebly.com/uploads/1/3/4/0/134019464/49ea7d7e57c86.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4462985/normal_602194caacb0e.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4379606/normal_6027d0f007775.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/93b42445-97f6-49db-9732-c3a77b8746dc/guide_to_federal_pharmacy_law_8th_edition.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/7cb58be7-5220-4538-bbd6-303c2f0677da/navfac_design_quality_control_plan.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/53d3d045-de54-4075-94b4-c1d4d975aa67/organic_chemistry_definition_simple.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/1fe57301-e68a-4bc4-94c7-0be419b9699e/la_bella_ceci_y_el_imprudente_cap_27.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/f1f6a5ee-f681-4e6b-916d-564117f238b4/how_to_change_active_voice_to_passive_voice_online.pdfIn PDF document text
    • http://wojipag.pbworks.com/f/mefuzuxesuzebon.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/aa8f5a00-9405-448f-bdde-02dc57da63c9/mukobi.pdfIn PDF document text
    • http://molitutolu.pbworks.com/f/rakodugex.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/a18e837e-2589-422f-bdef-911640aa1d07/why_hydrogenation_of_vegetable_oil_is_done.pdfIn PDF document text
    • http://sufasujozu.pbworks.com/f/17737928982.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/75dd933e-8738-4340-bd56-efbc54aaf625/vuwugevizujularigoliv.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/cbc35204-f071-4718-9c2b-65db273d338e/25409602590.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_off0000df16.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDF16 5612 bytes
SHA-256: 40dec6d38c25ec21adbd4595a243b9ff0f6cb514172ddb9038bcbdda152fd517
font_01_sfnt_off0000f212.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF212 13260 bytes
SHA-256: 1abd9d4c8790ba2555046874294d8e8805027d897d9311fbd9ae5cba9cc1bd5f

Open this report in the interactive analyzer, or submit your own file for analysis.