Malicious PDF — malware analysis report

Static analysis result for SHA-256 1f9c36d9dacebeed…

MALICIOUS

PDF

84.6 KB Created: 2021-04-08 03:44:55 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-24
MD5: 62ab8dbe2060438b1fdab32e5c102e33 SHA-1: caf76f05b812d84a8523bc228c4e6feb21ec0a41 SHA-256: 1f9c36d9dacebeedd825f34adcd07ea672691ba8cbb3c0003c4272388399680d
126 Risk Score

Malware Insights

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

The PDF file contains numerous embedded links, many pointing to disposable domains and exhibiting link farm characteristics, suggesting a phishing or malware distribution attempt. The ML classifier and ClamAV detection strongly indicate malicious intent. While no scripts were explicitly extracted, the PDF structure and embedded URIs are indicative of an attempt to redirect users to malicious content, likely for credential harvesting or further payload delivery.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

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=alaipayuthey+video+song+whatsapp+status+free PDF link annotation
    • http://rakojegad.22web.org/subject_verb_agreement_quiz_high_school.pdfIn PDF document text
    • http://nariwunuzaw.scienceontheweb.net/chemistry_periodic_table_file_download.pdfIn PDF document text
    • https://zevupizufaf.weebly.com/uploads/1/3/4/3/134315684/2459945.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4417408/normal_602154962265a.pdfIn PDF document text
    • https://tovibimatajo.weebly.com/uploads/1/3/5/9/135963052/a16d024.pdfIn PDF document text
    • http://towonededuv.medianewsonline.com/48870342188.pdfIn PDF document text
    • https://bativizamazon.weebly.com/uploads/1/3/4/7/134770744/linesoxasetiti.pdfIn PDF document text
    • https://tokuniti.weebly.com/uploads/1/3/4/3/134331772/lokumijule_woxitipekovas_votesod.pdfIn PDF document text
    • http://rozewevojalel.sportsontheweb.net/barbell_medicine_the_bridge_2._0.pdfIn PDF document text
    • http://gevazuvunurodum.22web.org/51988595651.pdfIn PDF document text
    • https://kalokawagubur.weebly.com/uploads/1/3/1/3/131398574/daban-gopejanix.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4479925/normal_5fdefcf37d97d.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/83d1acce-e2b5-4510-b410-5f88c85799da/kuxiwiwatefe.pdfIn PDF document text
    • http://niwurekatexo.atwebpages.com/63048012059.pdfIn PDF document text
    • http://sevojaninap.rf.gd/gupezudowojewimitemak.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/a7981bfd-9d29-4614-a656-5333f9ae62cd/tikik.pdfIn PDF document text
    • http://nokejufesuw.atwebpages.com/45686902924.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/77d4f886-f23c-4a1f-8951-820e6d8fe8c4/final_fantasy_7_remake_xbox_one_gamestop.pdfIn PDF document text
    • http://josuxak.atwebpages.com/angiospermic_characters_of_gnetum.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
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e1c8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE1C8 5548 bytes
SHA-256: 7a936e17bd57e5cc76a05f5e093be3f2c6ccf4fa17f4add5e724e9b517f7ab8c
font_01_sfnt_off0000f4c0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF4C0 3232 bytes
SHA-256: 8eb4e8e61c3fa398958615661994a294e4ea49136d91b51c211becfcc0f59521
font_02_sfnt_off000100ba.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x100BA 14020 bytes
SHA-256: 2745d86726297675e68c2fa0ccb3f9befdd1dcdb4f7f25bd9a4aeb7f14e2aae9
font_03_sfnt_off00012dc1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12DC1 16540 bytes
SHA-256: b7e2953174051f9f93150b462bbb78032069893244cc0461a5b46bfc46ca60fa

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