Malicious PDF — malware analysis report

Static analysis result for SHA-256 e9cfe9e4a42ab125…

MALICIOUS

PDF

76.4 KB Created: 2021-06-01 22:27:07 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-07-07
MD5: 1902df66c6646a614e6ce1fb265d6ee8 SHA-1: d9e7a089f3a16fb81852e0e34ae53cc9f5776c5f SHA-256: e9cfe9e4a42ab125425e0f2045650e05bb1dae8c1d88a27d75f3a4aef9cd21d3
126 Risk Score

Malware Insights

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

The PDF file contains numerous embedded URLs, with one specifically pointing to a domain associated with phishing and malware distribution. Heuristics indicate it functions as a link farm on disposable hosting, designed to redirect users. The ML classifier and ClamAV detection strongly suggest malicious intent, likely for phishing or malware delivery.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9995

Heuristics 5

  • 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.
  • 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://catamma.ru/pbw?utm_term=cheats+kirby+and+the+amazing+mirror+powers PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4461748/normal_60567bb1253d0.pdfIn PDF document text
    • https://kidepexabosu.weebly.com/uploads/1/3/4/2/134266059/02c783695f1946a.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4481552/normal_60248902218ae.pdfIn PDF document text
    • https://kazusabetife.weebly.com/uploads/1/3/5/3/135318045/0ece901.pdfIn PDF document text
    • https://lugekovatisemo.weebly.com/uploads/1/3/5/3/135337030/javofog.pdfIn PDF document text
    • https://xanojamazifedim.weebly.com/uploads/1/3/5/3/135323589/dee658e3b.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4410433/normal_5fe31f73b8f3a.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4403684/normal_604ae9ecd4e57.pdfIn PDF document text
    • https://static.s123-cdn-static-d.com/uploads/4463825/normal_60b61de1defdd.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4481067/normal_603aa51278518.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4388063/normal_6057f0205e85f.pdfIn PDF document text
    • https://sufeneva.weebly.com/uploads/1/3/4/5/134594805/5003391.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/1bb90ba9-08bf-4290-8618-b8f93fc17b2f/health_o_meter_digital_scale_kg_to_lbs.pdfIn PDF document text
    • http://xifilipisi.pbworks.com/w/file/fetch/144413715/66302139558.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/d2a1fcea-cd07-4c8e-a796-1ad5e3a07b58/artemis_fowl_book_the_seventh_dwarf.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/529a0276-9b7d-4e49-b294-5033f99dc97b/wunufipelesoroganojol.pdfIn PDF document text
    • http://foxobekizax.pbworks.com/w/file/fetch/144467463/xazevewamumejakominoxek.pdfIn PDF document text
    • http://bemulopawed.pbworks.com/f/wafukiludobesi.pdfIn PDF document text
    • http://tazijebep.pbworks.com/f/91587205795.pdfIn PDF document text
    • http://bekivuxuga.pbworks.com/f/download_film_teman_tapi_menikah_2_layarkaca21.pdfIn PDF document text
    • http://viluxese.pbworks.com/w/file/fetch/144423540/recommendation_letter_for_kindergarten_students_examples.pdfIn PDF document text
    • http://pezeliv.pbworks.com/w/file/fetch/144426501/classic_bomberman_hack_apk.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000d963.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD963 3740 bytes
SHA-256: 5efe2bd19fd98ee50b317fb94af97c2125f84ee828535adce3d76bb43cb9c2b6
font_01_sfnt_off0000e6e4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE6E4 5696 bytes
SHA-256: a579ade53b6974906992822f7665e399bb87cdf1293c4b74b15d96f6765386cd
font_02_sfnt_off0000fa33.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFA33 12284 bytes
SHA-256: 2140d85090c1f5935ad7798f9174fb01ab7672f2e8936b57283a5cf31fdf01e1

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