Malicious PDF — malware analysis report

Static analysis result for SHA-256 2c365642333e623e…

MALICIOUS

PDF

82.3 KB Created: 2021-04-08 01:16:09 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-13
MD5: bababc6343f1445867a6c5080d798853 SHA-1: e3f6686a7d41d79929b5cfe4c1dd2fbbe2c31a74 SHA-256: 2c365642333e623e8b4fdca90ff99339046cebc99608242b7306861a18ef1369
126 Risk Score

Malware Insights

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

The PDF file contains numerous embedded URLs, many of which point to disposable domains and are indicative of a phishing or scam attempt. The ML classifier and ClamAV detection strongly suggest malicious intent, likely related to phishing or malware distribution. The document body, though heavily obfuscated, contains text related to searching for online content, reinforcing the phishing lure.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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/strik?utm_term=ruin+and+rising+pdf+read+online PDF link annotation
    • http://oneitstore.info/mosumazitisenusozemusofed14zcd.pdfIn PDF document text
    • http://juwaniwabi.medianewsonline.com/65325536426.pdfIn PDF document text
    • http://lianhua.life/how_to_play_harmonica_for_beginnersbbdsg.pdfIn PDF document text
    • http://fukuzowi.sportsontheweb.net/25260993497.pdfIn PDF document text
    • https://cdn.sqhk.co/derilunadine/f9igih9/vlookup_google_sheets_multiple_matches.pdfIn PDF document text
    • http://taforojujutusig.mygamesonline.org/nixanumepuberewafo.pdfIn PDF document text
    • http://nakotigolajeg.scienceontheweb.net/52915594252.pdfIn PDF document text
    • https://cdn.sqhk.co/tajavujexiz/bDrhiib/1839903961.pdfIn PDF document text
    • http://xorabawik.medianewsonline.com/tidatawatakasilofajabipo.pdfIn PDF document text
    • http://shop50off.info/21940372144ld6v.pdfIn PDF document text
    • https://cdn.sqhk.co/gavivevok/Gibyo3x/general_cv_cover_letter_templates.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://eed7fa7e-4f31-4ba6-8269-e73f07ac74c5.filesusr.com/ugd/93374d_bb73890b5ea248e09a7d4065d40ff1b2.pdf?index=trueIn PDF document text
    • https://ae0ecf71-49bb-4ac4-bba4-d0f2a20d1af9.filesusr.com/ugd/668a47_c1f85e11463943c5ab87daad5704f2f6.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/foneniz/linixefetunudowitolelo.pdfIn PDF document text
    • http://fogokenum.onlinewebshop.net/22435338269.pdfIn PDF document text
    • https://065b66ee-25d8-4381-b309-094abc4d823c.filesusr.com/ugd/2703e6_f8ba91a965904116aed31f2ce274ed65.pdf?index=trueIn PDF document text
    • https://45180a89-8b92-4d54-a4c6-cdf0ad6af3c7.filesusr.com/ugd/2b98a3_81651ec661be4fa8929ec4a04102e901.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/zisulamisozoto/pakokitugalirokedixubobej.pdfIn PDF document text
    • https://s3.amazonaws.com/nakevoja/history_of_english_language_books_free_download.pdfIn PDF document text
    • http://lugifer.onlinewebshop.net/makawubasoni.pdfIn PDF document text
    • http://tiredosutozol.atwebpages.com/past_simple_passive_exercises_with_answers.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_off000100d9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x100D9 5216 bytes
SHA-256: 0fdb7eaa3c1ff6d8f258a8eef1801827fcc469437f87c6248ceeddfc4eb48af7
font_01_sfnt_off000112b0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x112B0 11848 bytes
SHA-256: 24e188c7d36ea5117da198a2ab846c4a02f33189dcc08df28faa5f5932e107e5

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