Malicious PDF — malware analysis report

Static analysis result for SHA-256 4b175adb607525a8…

MALICIOUS

PDF

74.3 KB Created: 2021-05-17 16:31:39 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-25
MD5: 23ea3927ee036ae708383e6687c2315a SHA-1: b24d7fb685f38020c045d60b4b549f924d959e0d SHA-256: 4b175adb607525a8cbe6a7488b6dafb3741757d131087ce509744ee4a7b158ae
126 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

This PDF document was flagged as malicious by ClamAV and an ML classifier. The file embeds a large number of external links characteristic of an SEO link farm. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

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://jottigo.ru/strik?utm_term=timex+expedition+indiglo+wr100m PDF link annotation
    • http://lovechat24.club/autocad_2013_full_tutorial820ww.pdfIn PDF document text
    • http://abreudesigns.com/wanawidipokupilesirzc507.pdfIn PDF document text
    • https://cdn.sqhk.co/xekawiba/h8jchiu/all-_in-_one_offline_maps_apk_download.pdfIn PDF document text
    • http://suwetobolubujub.getenjoyment.net/periodontitis_definition.pdfIn PDF document text
    • https://fejiwapofiji.weebly.com/uploads/1/3/4/6/134699364/bogira-matemobipiv.pdfIn PDF document text
    • http://nokojatagi.mywebcommunity.org/ielts_answer_sheet_reading_and_listening.pdfIn PDF document text
    • http://how2clever.com/top_up_flow_bvijps0b.pdfIn PDF document text
    • http://xuxetosufuzo.getenjoyment.net/achtung_panzer_kharkov_1943_pc.pdfIn PDF document text
    • https://xidoxuzi.weebly.com/uploads/1/3/4/7/134707988/efbaf6abe.pdfIn PDF document text
    • https://cdn.sqhk.co/jutigurotow/gejc0kU/academic_performance_traduction.pdfIn PDF document text
    • http://pubofumoxo.scienceontheweb.net/fabifibawibuko.pdfIn PDF document text
    • http://miiliioner.xyz/97724032730qlr5o.pdfIn PDF document text
    • https://cdn.sqhk.co/gutinisiv/jcWhdjd/tawozebivus.pdfIn PDF document text
    • http://20970907.net/map_of_ukraine_with_citieswl5zf.pdfIn PDF document text
    • http://limavirom.22web.org/peter_thiel_zero_to_one_free.pdfIn PDF document text
    • http://zalanikovuz.iblogger.org/jogitelu.pdfIn PDF document text
    • https://varijamali.weebly.com/uploads/1/3/1/8/131856150/pakapufisepom-losow-dutusox.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://jikelaxapexa.onlinewebshop.net/74777204630.pdfIn PDF document text
    • http://mitufesidu.epizy.com/aaj_din_valentine_da_song_ninja.pdfIn PDF document text
    • http://napamewa.atwebpages.com/rti_application_form_odisha.pdfIn PDF document text
    • http://repuvamiperubo.epizy.com/best_friend_poems_copy_and_paste.pdfIn PDF document text
    • http://vatupizukuvos.rf.gd/bapikibafugimif.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

Related samples 8

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e586.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE586 5196 bytes
SHA-256: 8f27fdddf755a41015b41c33020b6b5f689fddd147f69fc60230b363dd6d7d09
font_01_sfnt_off0000f73d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF73D 10836 bytes
SHA-256: d555334ea5c5c1e8ddd072f2a214e6796e60f3086221254d1517cf1b7951c054

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