Malicious PDF — malware analysis report

Static analysis result for SHA-256 c970e566c7264e8d…

MALICIOUS

PDF

85.2 KB Created: 2021-03-19 04:38:44 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-07-10
MD5: 3ec4d883a78192c8b102ac06d2fedf98 SHA-1: 22144b81a1b5bb45f9d523609053d6ab355192b5 SHA-256: c970e566c7264e8d7e8879c42cb28b2564e368cb5a380f4d9a2ba4d4412ff420
134 Risk Score

Malware Insights

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

The PDF contains numerous embedded URLs pointing to disposable domains, a technique commonly used in phishing campaigns to obscure malicious intent. The ML classifier and ClamAV detection strongly indicate maliciousness, with ClamAV identifying it as a phishing trojan. The presence of a 'download button' heuristic further supports the phishing lure.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9993

Heuristics 6

  • 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 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.
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • 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=presonus+central+station+review PDF link annotation
    • http://coolstudent.space/kagelemivipepitinizives8eeh.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4378151/normal_5ffab6905bae7.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4389108/normal_5fc80c2acd146.pdfIn PDF document text
    • http://testrun.ru/51467289792g88p2.pdfIn PDF document text
    • http://vitrinachel.ru/perezapepamat8fkdb.pdfIn PDF document text
    • http://apparently-home.com/toxijaniwun6d6du.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4405644/normal_6052d2a39b86a.pdfIn PDF document text
    • http://load-bcp.com/how_to_use_bob_revolution_strollerho9yh.pdfIn PDF document text
    • http://tronreserve.online/best_pizza_dough_recipe_bread_machine_uk3a2qp.pdfIn PDF document text
    • http://gbo.guru/870692563311n4zx.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4451556/normal_5febbfa6dbe6c.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4387243/normal_5ffcc80932d39.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://sovizaz.epizy.com/how_to_troubleshoot_a_bad_compressor.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/4c6130c4-49c2-44d6-9394-24229a65dc85/how_to_open_kitchenaid_trash_compactor.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/cd9f1a6d-3993-49f1-ba4a-3658271537cf/forifini.pdfIn PDF document text
    • http://mevusajilitum.rf.gd/minecraft_skin_packs.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/42c402ab-e475-4c83-b1b0-aa32ddc355af/what_is_non_woven_interfacing_material.pdfIn PDF document text
    • http://rafobubavotiba.epizy.com/gaxukofokepudo.pdfIn PDF document text
    • https://s3.amazonaws.com/ragejufa/freezer_not_cold_enough_in_hot_weather.pdfIn PDF document text
    • https://s3.amazonaws.com/lewuli/payzapp_apk_3.pdfIn PDF document text
    • https://s3.amazonaws.com/wazotojemov/mezuxisebalewu.pdfIn PDF document text
    • http://marilineme.epizy.com/whistler_snow_report_ski_club.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/9d7e2f6c-6af6-4767-8fdf-98188d6f37d5/arbys_that_serve_breakfast_near_me.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/f06cca2e-85a8-4ccf-a987-19a7e4b54792/oracle_database_sql_certified_expert_1z0-047.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_off00010ec6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10EC6 4944 bytes
SHA-256: 4c67802b84b905238bab7e0a40a7db6e8fe5e841205ea33abf0ff51797a80255
font_01_sfnt_off00011fb8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11FB8 11712 bytes
SHA-256: 6577497ea88d67be0664791234d35579847c5257882a9fb6af88570e9272786f