Malicious PDF — malware analysis report

Static analysis result for SHA-256 ded6b1f9007c63cf…

MALICIOUS

PDF

76.9 KB Created: 2021-03-22 02:55:30 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-08-25
MD5: c7e06a8fc247a8cf69d4777d2bd18f31 SHA-1: 2b935b99b00b8d7b94ccc1d58f28813c54f9c492 SHA-256: ded6b1f9007c63cf0932df74cf9274587c476b7fbd1b2e1cd199ac7ecbbec25a
126 Risk Score

Malware Insights

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

The PDF contains numerous embedded URLs, many of which point to disposable hosting and are likely part of a link farm designed to redirect users. The ML classifier and ClamAV detection strongly indicate malicious intent, specifically phishing. The document body, though heavily obfuscated, appears to be a lure related to a search query, further supporting the phishing attack pattern.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9993

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
  • 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://xajibur.ru/strik?utm_term=what+does+the+colour+red+mean+in+the+catholic+church PDF link annotation
    • http://tifoxikutawe.sportsontheweb.net/old_yeller_novel_study.pdfIn PDF document text
    • http://fasadi.site/77924632693q7r0d.pdfIn PDF document text
    • http://sberin.xyz/573821142935hmg5.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4459337/normal_602d6e91e6925.pdfIn PDF document text
    • http://fukuzowi.sportsontheweb.net/the_missing_series_2_episode_1_review.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4501998/normal_5ff958fb65aea.pdfIn PDF document text
    • http://novubelugalij.medianewsonline.com/puzofotebenesetuvedezol.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4483873/normal_5fd0e476dec84.pdfIn PDF document text
    • http://vexasefagi.scienceontheweb.net/58995137552.pdfIn PDF document text
    • http://zeropium.com/how_to_crochet_a_ring_for_beginnerstsecm.pdfIn PDF document text
    • http://zomixuxoluzijum.mywebcommunity.org/the_role_of_bacteriocin_in_food_safety.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4380867/normal_6025cc6cd9dcc.pdfIn PDF document text
    • http://janafan.scienceontheweb.net/facial_nerve_palsy_treatment.pdfIn PDF document text
    • http://zaxevef.getenjoyment.net/anna_university_annexure_1_journal_list_2020.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://64e18f06-8a0e-4dc1-8427-9dd81b4bff36.filesusr.com/ugd/baa514_7d55feb134584d47a5eaab49bc350dad.pdf?index=trueIn PDF document text
    • https://1ffb5d6c-d890-49e0-9b87-dc10fbfa49e2.filesusr.com/ugd/8bc2a6_2f413033d04f45bcb9c21773a98170e0.pdf?index=trueIn PDF document text
    • https://2d130471-2a64-48ba-87cf-8f1e86c6acad.filesusr.com/ugd/9c43ec_1c10cab8940741919feb641c0c0c3978.pdf?index=trueIn PDF document text
    • https://02408c19-b9f6-4996-a596-1d5b7e46c8d3.filesusr.com/ugd/c83fdb_b6868e8d676346aab2bc0925bddd4647.pdf?index=trueIn PDF document text
    • https://625f08e2-3d8e-45b5-8e8c-b95d001c5c7c.filesusr.com/ugd/d94ae5_19b13d965d2a43a29a5e1425399fa1b2.pdf?index=trueIn PDF document text
    • https://12c9c681-cafc-4f88-93da-cb6f471fd49a.filesusr.com/ugd/f09a9d_ac51bd587b444c71a58562cabbc6a2bd.pdf?index=trueIn PDF document text
    • https://ca7c05ed-d233-4774-9cf9-08ff86aa6c73.filesusr.com/ugd/b42fd6_3274c0eeeb864f8dbcf83897abab19e2.pdf?index=trueIn PDF document text
    • http://kubomefewofumim.atwebpages.com/95956280713.pdfIn PDF document text
    • http://sogoxutagejuno.atwebpages.com/handout_achilles_tendinitis.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_off0000ee2a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEE2A 5192 bytes
SHA-256: 441bc59e069453fd01008ada20ee2efe5f2f9744244bec0c0601c63d4c9dc508
font_01_sfnt_off0000ffb6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFFB6 11140 bytes
SHA-256: 32c193fd24ec25ef9491609e2cf59cda59c9af2ac8138891bf4be9c479a811ca