Malicious PDF — malware analysis report

Static analysis result for SHA-256 30d0e679c18225b4…

MALICIOUS

PDF

74.3 KB Created: 2021-03-03 05:53:45 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-23
MD5: c9acfa3445859df1d4f3521c9d8b1937 SHA-1: 9a1fd70c7528ab263f24dd99eee1fd880abdccee SHA-256: 30d0e679c18225b4eabee7e4a1c00581acd9c4bc32d2d264fd281ebe32d89402
186 Risk Score

Malware Insights

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

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 0.9998

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://gimoguvi.ru/123?utm_term=how+to+unlock+thermostat+honeywell PDF link annotation
    • http://gavediteriremuv.medianewsonline.com/how_to_get_meeting_with_anyone.pdfIn PDF document text
    • https://dumidonawusirug.weebly.com/uploads/1/3/5/3/135306770/3568331.pdfIn PDF document text
    • https://lonofajizol.weebly.com/uploads/1/3/5/3/135389348/88301.pdfIn PDF document text
    • http://ravovenovibu.medianewsonline.com/samsung_rf268abrs_ice_maker.pdfIn PDF document text
    • http://kanaxade.mygamesonline.org/which_fruits_are_gluten_free.pdfIn PDF document text
    • https://pemanawawe.weebly.com/uploads/1/3/5/3/135320082/kilibiwowumaf-toduzusugo-lolugu-wigefa.pdfIn PDF document text
    • https://vawegoti.weebly.com/uploads/1/3/0/8/130874218/lipatub.pdfIn PDF document text
    • http://mikovil.mywebcommunity.org/lg_inverter_direct_drive_washer_not_cleaning_clothes.pdfIn PDF document text
    • https://vexakoloninabi.weebly.com/uploads/1/3/4/8/134851928/mexadowuboge.pdfIn PDF document text
    • https://fabupegux.weebly.com/uploads/1/3/4/6/134689396/juberu_tawebenorogixi.pdfIn PDF document text
    • https://vemusosafuz.weebly.com/uploads/1/3/1/3/131398108/diduso.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://sovizaz.epizy.com/muxof.pdfIn PDF document text
    • http://tuxexagixib.rf.gd/96628592981.pdfIn PDF document text
    • http://kavolimuteso.epizy.com/55120199309.pdfIn PDF document text
    • http://nitumajalu.epizy.com/muxovomo.pdfIn PDF document text
    • http://rizaxofu.rf.gd/annadata_books_telugu_june_2019.pdfIn PDF document text
    • http://fonivez.epizy.com/16748705037.pdfIn PDF document text
    • http://bujepefu.epizy.com/17162585788.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_off0000e60c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE60C 5260 bytes
SHA-256: ea504874b92d944d2fe8a759458fc6c6c68e1b0b88c2541d27fced7797d4da62
font_01_sfnt_off0000f7d1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF7D1 10556 bytes
SHA-256: 19671b48f7301b894e08186713b87cf7094d9244acfda097061920f70aa4a0d5

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