Malicious PDF — malware analysis report

Static analysis result for SHA-256 ffff947a4661a2b2…

MALICIOUS

PDF

82.1 KB Created: 2021-03-29 01:31:23 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-25
MD5: fae3dbffeda9b9fd172af7bdd752069f SHA-1: d1d862fff9d535a493e969da4312111ed918fe47 SHA-256: ffff947a4661a2b23a101350fe269053ec28e11fc63adf0910ea6dcefd052181
126 Risk Score

Malware Insights

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

The sample was detected as malicious by ML classifiers and ClamAV, indicating a high likelihood of malicious intent. It contains numerous external URIs and embedded URLs, suggesting it is designed to redirect users to potentially harmful websites. The PDF structure and embedded content, though obfuscated, point towards a phishing or malware distribution scheme.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9993

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://golowaki.ru/wix?keyword=apple+symbolism+in+movies PDF link annotation
    • https://cdn.sqhk.co/gegojagakexu/cXsZij7/america_s_funniest_home_videos_new_host.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4487641/normal_6043f425b8a88.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4451929/normal_60055f0f8dabf.pdfIn PDF document text
    • http://radanews.site/dark_raider_mod_apk_1._00fq0a.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4412891/normal_5fd262664d7a7.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4425487/normal_6005f85f060fb.pdfIn PDF document text
    • https://cdn.sqhk.co/jabosuve/haY6x65/32900980152.pdfIn PDF document text
    • http://bridgecommerce.com/2627441891491hsl.pdfIn PDF document text
    • http://vodoroding.info/885836954183qjwc.pdfIn PDF document text
    • http://carinsusa.info/spectrum_math_workbook_grade_8_free92cvz.pdfIn PDF document text
    • https://cdn.sqhk.co/zefadanexa/Vjd5gi2/toboz.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4492245/normal_605a1c993383d.pdfIn PDF document text
    • https://cdn.sqhk.co/lolatonuvesa/zhhjaie/jutupa.pdfIn PDF document text
    • http://nizozipup.22web.org/lagonafe.pdfIn PDF document text
    • http://goproonly.com/37309390539b8mk5.pdfIn PDF document text
    • http://handler-autoscout24.com/campers_knot_tying_gameq9mip.pdfIn PDF document text
    • http://pet-guru.shop/gesasixuridujizewamugalih5dhb.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://tewufadab.epizy.com/57167806035.pdfIn PDF document text
    • https://s3.amazonaws.com/xuvamuba/grandmother_s_day_card_template.pdfIn PDF document text
    • http://zavivemigowoson.epizy.com/pascals_triangle_worksheet_answer_key.pdfIn PDF document text
    • https://s3.amazonaws.com/legipalofi/summer_picnic_flyer_template_word.pdfIn PDF document text
    • http://lizaduguxo.epizy.com/b_a_pass_2_movie_free.pdfIn PDF document text
    • https://s3.amazonaws.com/zatazewoz/rukurubo.pdfIn PDF document text
    • https://s3.amazonaws.com/nijudow/86150871313.pdfIn PDF document text
    • https://s3.amazonaws.com/zafaronivaj/excel_indirect_address_from_another_sheet.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_off00010446.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10446 4948 bytes
SHA-256: a5171cd6765cd85f67ff0babe628305793236defb9f0fa68e9028610122fef48
font_01_sfnt_off0001151a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1151A 11212 bytes
SHA-256: 754bc35d09fdf42a8b9c621ceeb016e99a6f4b68e499ff805bc63521c136bbcc

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