Malicious PDF — malware analysis report

Static analysis result for SHA-256 26eeefa45b5ece6d…

MALICIOUS

PDF

80.6 KB Created: 2021-03-03 03:51:08 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-26
MD5: 913b5d0326b76972c86b276ada3a43eb SHA-1: 74cf1227bedcb6f22a1c7fc439a488ff333d965a SHA-256: 26eeefa45b5ece6d7ba154e7cd23060daf50bb576dce371fe86ecafe176ee36e
126 Risk Score

Malware Insights

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

The PDF file contains embedded URLs and is flagged by heuristics as a link farm on disposable hosting, indicating a phishing or malware distribution attempt. The ML classifier and ClamAV detection strongly suggest malicious intent. While no scripts were explicitly extracted, the PDF structure and embedded URIs point towards a lure to a malicious website, likely for phishing or malware delivery.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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://gimoguvi.ru/wb?keyword=python%20coding%20interview%20questions%20and%20answers PDF link annotation
    • http://zozegakipuvi.iblogger.org/zulurinilolejodiduroloj.pdfIn PDF document text
    • https://bufudelazevel.weebly.com/uploads/1/3/4/7/134734798/f830c8f0e.pdfIn PDF document text
    • https://tezenilul.weebly.com/uploads/1/3/6/0/136085996/972915.pdfIn PDF document text
    • http://austritkfa.com/795398569716iygs.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4484632/normal_5fe95d3785df9.pdfIn PDF document text
    • https://mekebibarefuj.weebly.com/uploads/1/3/5/3/135335096/denoxazaxuzover-lutaviruxiniruj.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4389084/normal_5ff773c8d02d8.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4494877/normal_5ff08250b1aca.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • http://reluwiz.epizy.com/windows_10_language_pack.pdfIn PDF document text
    • https://s3.amazonaws.com/fuvidokibet/tidegokawili.pdfIn PDF document text
    • http://gejiregi.rf.gd/62258410301.pdfIn PDF document text
    • http://fetelezazojidi.rf.gd/lyrics_to_my_god_can_do_anything.pdfIn PDF document text
    • https://s3.amazonaws.com/zugutixe/media_player_for_windows_10.pdfIn PDF document text
    • http://magajavopisili.epizy.com/preterite_tense_spanish_worksheet_answers.pdfIn PDF document text
    • http://sewasijibakel.epizy.com/kenododeripados.pdfIn PDF document text
    • http://kebanibaru.epizy.com/what_to_expect_during_a_home_walk_through.pdfIn PDF document text
    • https://s3.amazonaws.com/genedesowul/wotuk.pdfIn PDF document text
    • https://s3.amazonaws.com/padosumifubobo/73674566007.pdfIn PDF document text
    • http://vugapadilubokis.epizy.com/couchsurfing_app_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_off0000efae.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEFAE 5432 bytes
SHA-256: dc3250bf36740f4e52702129bb479108bc857cd6f137792dbdd915f42ced85cf
font_01_sfnt_off0001022b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1022B 10748 bytes
SHA-256: fc1cf6b0242cf56e5bbe5d27a4342d865d5ee0c3285a7ee861b38b704e68b85f
font_02_sfnt_off000126bd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x126BD 4324 bytes
SHA-256: b50a2106bf82917db0cd3cf88f63c5e8cc3298b343ace5cffc591b35df33d24c

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