Malicious PDF — malware analysis report

Static analysis result for SHA-256 2fced93e66996e39…

MALICIOUS

PDF

75.9 KB Created: 2021-01-21 21:58:29 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-27
MD5: 989fee1ea6373f1d844d73adaac0761c SHA-1: bf0d64079eae8ec2af71dd8a4878a80215db34bc SHA-256: 2fced93e66996e3956c5908505bb3755a96158256c862f7370a71dd9ab17d5f5
156 Risk Score

Malware Insights

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

The PDF contains numerous external links, a common tactic for SEO spam and phishing. The ML classifier and ClamAV detection strongly indicate malicious intent. The document body, though heavily obfuscated, contains text related to search queries, suggesting a lure to external malicious websites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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 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.
  • 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/123?utm_term=rainbow+loom+fishtail+using+fingers PDF link annotation
    • http://senenetikoxikom.22web.org/cambridgeshire_police_freedom_of_information_request.pdfIn PDF document text
    • http://kiwufaninini.22web.org/37016484966.pdfIn PDF document text
    • http://merogerofame.66ghz.com/biryani_hd_1080p_video_song.pdfIn PDF document text
    • https://pegavuvusejeda.weebly.com/uploads/1/3/1/4/131483027/lexegazapolex_wituv_bokuwib.pdfIn PDF document text
    • https://tigidejuremu.weebly.com/uploads/1/3/4/5/134502839/cd49ba6.pdfIn PDF document text
    • https://nuzotononi.weebly.com/uploads/1/3/4/0/134012627/bovoxotorega.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/zafibimutadoti/1411596213.pdfIn PDF document text
    • https://s3.amazonaws.com/bupaxomu/answer_answer_sheet.pdfIn PDF document text
    • http://fepoxojosatomu.epizy.com/opposites_examples_worksheets.pdfIn PDF document text
    • https://s3.amazonaws.com/nefomojuwet/divide_et_impera_strategy_guide.pdfIn PDF document text
    • https://s3.amazonaws.com/fupanabivote/new_gcse_guidelines.pdfIn PDF document text
    • http://lidekajemunow.epizy.com/bhojpuri_song_2019_video_hd.pdfIn PDF document text
    • https://s3.amazonaws.com/gogoxowiniza/14466036478.pdfIn PDF document text
    • http://jeputujakajaj.epizy.com/bigupabakiwinopa.pdfIn PDF document text
    • https://s3.amazonaws.com/magapeguwabe/vigusiduva.pdfIn PDF document text
    • http://riwugenesujo.epizy.com/68931572318.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_off0000ebc5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEBC5 5420 bytes
SHA-256: 182681296003be35e0bd0679e3e7986b9546829a38975c8211537ae75df741f4
font_01_sfnt_off0000fe21.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFE21 10692 bytes
SHA-256: 8da1473bf4c2a3235e5c7e50cd2eca27d8f0b42d33141f9f8fb5dce490d9d716

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