Malicious PDF — malware analysis report

Static analysis result for SHA-256 0482ff32c8832ce6…

MALICIOUS

PDF

88.5 KB Created: 2021-05-29 05:10:45 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-25
MD5: 115994f9e4db55a55755f92130d598fc SHA-1: 91dc4eaa2256df7c33c43cf8c4112b3503e61e8e SHA-256: 0482ff32c8832ce67e0656c4a2521594d5759fc78fbb85475028767700b28ba0
186 Risk Score

Malware Insights

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

This PDF document is identified as malicious by ML classifiers and ClamAV, indicating a high likelihood of malicious intent. It functions as a link farm, directing users to numerous external URLs, including one on 'pelibifir.ru' which is suspicious. The document's structure and embedded links suggest it is designed to facilitate phishing or distribute further malware. No scripts were extracted, but the PDF's nature as a link farm is a strong indicator of malicious activity.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

Heuristics 6

  • 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 contains mass external PDF link farm critical PDF_SEO_LINK_FARM
    Small PDF contains many clickable external PDF links, mostly clustered on one host. This matches generated SEO/link-farm PDF carriers used to route users into malicious or unwanted-software delivery chains, rather than a normal document citation pattern.
  • 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://pelibifir.ru/strik?utm_term=zero+two%2527s+real+name PDF link annotation
    • https://fadafiwu.weebly.com/uploads/1/3/5/3/135302778/figowukaxote.pdfIn PDF document text
    • https://zifidobu.weebly.com/uploads/1/3/4/3/134371145/2175612.pdfIn PDF document text
    • https://nogudoge.weebly.com/uploads/1/3/4/0/134017621/nifobefuraxise.pdfIn PDF document text
    • https://sixamipad.weebly.com/uploads/1/3/4/7/134726782/1460398.pdfIn PDF document text
    • https://xubesizodumuruk.weebly.com/uploads/1/3/4/7/134703494/1eda98eead4c.pdfIn PDF document text
    • https://rediwikutine.weebly.com/uploads/1/3/4/0/134096605/934809.pdfIn PDF document text
    • https://nitomono.weebly.com/uploads/1/3/1/4/131454496/jeruwumemi-vuxamesu.pdfIn PDF document text
    • https://monivewuvafa.weebly.com/uploads/1/3/4/0/134096064/befitosus.pdfIn PDF document text
    • https://jafoxoxuxovawe.weebly.com/uploads/1/3/0/8/130813536/3749558.pdfIn PDF document text
    • https://sesoguxanijiba.weebly.com/uploads/1/3/5/3/135309487/razafopozedej.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/e4459eed-e494-4763-bf41-c366491c2cfb/kesazotaxineg.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/55ce28e7-db00-442e-894c-5dcd68c7ce07/wapasijepi.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/0a7a5fca-afd9-435e-8630-8662c4c6dc74/nazekuxis.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/7ed72a52-6366-4396-bf80-88bb30756023/funny_rude_christmas_songs_lyrics.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/89917522-afd0-426b-bfed-246b2f75f7a6/marketing_management_15th_edition.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/87b1ee9f-7366-4377-a825-b2e6fa3ce654/pupemetuxamavobuso.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/2b227ba4-26ec-4a70-bd95-6031beed82f9/download_walkthrough_final_fantasy_7_bahasa_indonesia.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/bbb44c65-5f2b-468c-9a08-974c1079cab5/jersey_mikes_philly_nutrition.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/81fef255-d46b-4a58-ade9-15e192bed231/tubidy_mobile_musica_gratis_para_descargar_mp3.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/3ebf81c8-69bd-4be1-af39-d8d055a2ebd4/vewusaboledak.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/58a711cc-5d72-4726-b52d-7895a34b9a01/how_to_change_photo_into_painting_in_photoshop.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_off00011e2c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11E2C 4912 bytes
SHA-256: a5f275aea4cf35772b3539430095abea7f7bcbefea6834ef1fdaac85d6e4a029
font_01_sfnt_off00012ee3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12EE3 11016 bytes
SHA-256: 1c174591c79ab3583ba9da0a8fbf7a9091698ede289d6ad9f33a344384e6f750