Malicious PDF — malware analysis report

Static analysis result for SHA-256 5892d0a713eeb020…

MALICIOUS

PDF

84.5 KB Created: 2021-03-17 00:01:10 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-21
MD5: f3146be043bbce6608a2dcd7841a9144 SHA-1: c25a05f2613b802e7915b6acd9c60ad399bc61a4 SHA-256: 5892d0a713eeb020260dc7a24438b2763036a5bf57120e6ac3eb230ac3cfc73a
126 Risk Score

Malware Insights

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

The PDF document contains numerous external URIs, with one prominent URL suggesting a lure for 'adobe photoshop latest apk'. The ML classifier and ClamAV detection strongly indicate malicious intent, likely related to phishing or malware distribution. While no scripts were explicitly extracted, the PDF structure and embedded URLs point towards a social engineering attack aiming to trick users into downloading a payload.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9992

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://bologen.ru/123?utm_term=adobe+photoshop+latest+apk PDF link annotation
    • http://kexedeziferu.sportsontheweb.net/44284808978.pdfIn PDF document text
    • http://rowowevu.mypressonline.com/permutation_and_combination_worksheet_with_answers_doc.pdfIn PDF document text
    • http://makululi.iblogger.org/graphing_absolute_value_inequalities.pdfIn PDF document text
    • https://verigidiloje.weebly.com/uploads/1/3/0/8/130874422/vozaluzatupe.pdfIn PDF document text
    • http://pililiriniru.mypressonline.com/56303396897.pdfIn PDF document text
    • https://basazujuw.weebly.com/uploads/1/3/5/3/135301233/0436c517fff851c.pdfIn PDF document text
    • https://xixinuwomisit.weebly.com/uploads/1/3/1/4/131437484/xuwanimiraf.pdfIn PDF document text
    • http://pasiworuwiwoz.getenjoyment.net/cisco_ccna_networking_for_beginners.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/muvazi/tascam_dr_60dmkii_manual.pdfIn PDF document text
    • http://semowomeso.onlinewebshop.net/16205178183.pdfIn PDF document text
    • http://nepogewapiw.epizy.com/77242596824.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/266e3e1b-01f8-4351-b66b-e87f99b0a5ef/78686237545.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/007c19b5-5f2b-4211-b3c4-4f6170e4cd5b/51121897925.pdfIn PDF document text
    • https://s3.amazonaws.com/nitirew/forrest_gump_suite_piano_sheet.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/6601e3cb-769e-4874-86b3-31cd0c8c1a3b/wofixagefokimelizizaboj.pdfIn PDF document text
    • http://bujijawuta.atwebpages.com/49520723094.pdfIn PDF document text
    • http://sutazobizomobuz.rf.gd/firilosutibudix.pdfIn PDF document text
    • https://s3.amazonaws.com/pilazi/contact_information_template_html.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/982eb044-488d-41c1-95e0-05d8bdd9d81f/2010_chevy_camaro_rs_tire_size.pdfIn PDF document text
    • http://xojaxuvepe.epizy.com/vikexarova.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/9ac697df-0a7e-44cd-bc2c-a595a4505fff/91426235138.pdfIn PDF document text
    • http://vebagakid.onlinewebshop.net/nicholas_sparks_latest_books_2018.pdfIn PDF document text
    • https://s3.amazonaws.com/mipizaju/mosunanejidumere.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_off00010d8e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10D8E 5144 bytes
SHA-256: ab6b6e5b1263d3acb390c538fd89787816ca2aa98beb2ce528951162acb9b533
font_01_sfnt_off00011f04.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11F04 10940 bytes
SHA-256: 770660c358bb6eb85f64e8aedcf9f01d98618fa4adee136470d91b73fd27311b

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