Malicious PDF — malware analysis report

Static analysis result for SHA-256 611d067fc40a5c34…

MALICIOUS

PDF

89.9 KB Created: 2021-04-05 20:13:44 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-08-20
MD5: a39cdce8a711ced7d98767d2744139a2 SHA-1: 2024251677fa0f4f6d17ad60f0402118e1156f54 SHA-256: 611d067fc40a5c346419d2475db633b9d2394bf94e68e25ee697dd586d79080f
196 Risk Score

Malware Insights

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

This PDF file was detected as malicious by ClamAV and an ML classifier. It contains numerous external links, including a link farm and an SEO redirector disguised as a free download lure for 'Red Dead Redemption 2'. The primary malicious URLs identified are golowaki.ru and feremujidonigu.getenjoyment.net, which likely serve as phishing or malware distribution points.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9995

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.
  • Image lure linking to an SEO redirector (free-download phishing) high PDF_SEO_UTM_REDIRECTOR_LINK
    PDF embeds an image with little or no body text and a clickable link to a multi-word utm_term / FeedBurner-proxied SEO redirector — the 'free ebook / solution-manual / document download' phishing family that ranks for natural-language search queries and routes the user into a payload/redirect chain. The PDF carries no exploit; the risk is the linked destination. Flagged structurally (image lure + SEO redirector) so it does not depend on a ClamAV/ML signature, and regardless of how many filler text pages the lure carries.
  • 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/strik?utm_term=how+to+get+100+in+red+dead+redemption+2 PDF link annotation
    • http://feremujidonigu.getenjoyment.net/32092923572.pdfIn PDF document text
    • https://vetitigozep.weebly.com/uploads/1/3/1/4/131437709/2631790.pdfIn PDF document text
    • https://sasogobol.weebly.com/uploads/1/3/4/3/134387633/mekiloferi_texuzifopite_wowixesalagut.pdfIn PDF document text
    • https://lizitizesibegip.weebly.com/uploads/1/3/4/6/134685526/tanuso.pdfIn PDF document text
    • http://lipexifinidoda.scienceontheweb.net/agamemnon_esquilo.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
    • https://s3.amazonaws.com/nonipesikiri/sap_odata_tutorial.pdfIn PDF document text
    • https://45ed8376-e832-497f-ab20-0a31924dc5db.filesusr.com/ugd/4b7290_07df06677e524960829a036530ec7df2.pdf?index=trueIn PDF document text
    • https://e46eb8ae-11b5-47af-91b5-79e2db369635.filesusr.com/ugd/f84671_53df0c63000342c2a1a55df7f76a36e0.pdf?index=trueIn PDF document text
    • https://367e539a-c541-4439-991c-4bf2bef2aa7a.filesusr.com/ugd/77d535_e6deeacfa9d44214aabc9ce9ed863e89.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/kewakuko/66255465552.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/efaf7ca1-b4dd-42f8-98f5-7eb634039914/rusosixavilivo.pdfIn PDF document text
    • http://nabafutig.myartsonline.com/how_to_calculate_speed_of_alpha_particle.pdfIn PDF document text
    • https://s3.amazonaws.com/juduk/59962269906.pdfIn PDF document text
    • https://s3.amazonaws.com/zepifudoxapo/sony_s_master_digital_amplifier_specs.pdfIn PDF document text
    • https://s3.amazonaws.com/xabalaru/westlife_better_man_lyrics_mp4.pdfIn PDF document text
    • https://s3.amazonaws.com/juzowilipi/biwupuw.pdfIn PDF document text
    • https://s3.amazonaws.com/rovuweraja/44880663533.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/4c8294a4-de2d-402b-8fdd-eae25fd91119/youth_ministry_lesson_plan_template.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/007ce5be-b983-40c6-8595-63af7aef53a5/fimoxu.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/10be832b-b0e2-41cf-99c7-dc210652cd45/organic_chemistry_some_basic_principles_and_techniques_class_11_shiksha_house.pdfIn PDF document text
    • https://s3.amazonaws.com/sumesawoxajew/kodopoluv.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/f18fa694-fdbb-49a4-a6d1-5a050f8b7f88/58799530216.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_off00011328.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11328 5236 bytes
SHA-256: 122c38ea8730d6c8f528a8251993fdd0faca1b6e369346357f3384ed321fa453
font_01_sfnt_off000124ec.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x124EC 11312 bytes
SHA-256: 2a9928908cf678e2e6ff29c486d20ee146815387301e7b53797ae6462696dfe3
font_02_sfnt_off00014b79.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x14B79 4324 bytes
SHA-256: 1158d95dac44631f497756703988ba3645251422e7ff0015d3fca430225e7c3e