Malicious PDF — malware analysis report

Static analysis result for SHA-256 70cccb8936d780a1…

MALICIOUS

PDF

62.9 KB Created: 2021-02-10 20:48:59 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-15
MD5: 0a593ed7871c03072104cf7e8f6c3498 SHA-1: e4c43634e45e8fd261e9b565a3002b4b54a86eda SHA-256: 70cccb8936d780a12d9653389fa01fa7a915fbad92bfa1a19fe3398991cb32e2
156 Risk Score

Malware Insights

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

The PDF file contains a significant number of external links, identified by the PDF_SEO_LINK_FARM heuristic, pointing to various domains. This suggests a tactic to manipulate search engine results or to host phishing content. The ClamAV detection and ML classifier further confirm its malicious nature, likely as a phishing or malware distribution lure.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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 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://baarspo.ru/123?utm_term=net+cash+provided+by+investing+activities PDF link annotation
    • https://tujobofawoti.weebly.com/uploads/1/3/2/6/132695409/fatip-roxasol-nurepupexubuvag.pdfIn PDF document text
    • https://cdn.sqhk.co/kawonidoza/3hdEjgU/for_you_tiktok_page.pdfIn PDF document text
    • https://cdn.sqhk.co/sadirorig/bICR0Lf/movoxaxefolukozu.pdfIn PDF document text
    • http://arnautmebel.ru/logiciel_schema_tableau_electrique_gratuit_schneiderpnbc5.pdfIn PDF document text
    • https://cdn.sqhk.co/mimofeto/ZhjjhZg/misodofiv.pdfIn PDF document text
    • http://usechambre.xyz/king_size_bed_sheet_set_canadakz9yk.pdfIn PDF document text
    • https://cdn.sqhk.co/dasisogi/7saicHQ/lofinudapebinezap.pdfIn PDF document text
    • https://cdn.sqhk.co/jagakutojut/gjyibcK/85013020121.pdfIn PDF document text
    • https://cdn.sqhk.co/ragojagef/ibzYgiW/bosonikaxom.pdfIn PDF document text
    • http://megatorg.ru/29619415571214ix.pdfIn PDF document text
    • https://cdn.sqhk.co/xolokenuw/ZjfeAhj/momatixozakojigu.pdfIn PDF document text
    • https://cdn.sqhk.co/devisofage/Pgcgeji/29838797448.pdfIn PDF document text
    • http://thelait.pro/dufobad4s5n.pdfIn PDF document text
    • https://cdn.sqhk.co/nugunexinazo/hRcjjam/gelerewejibawol.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/jipowumat/sherlock_holmes_hat_template.pdfIn PDF document text
    • https://s3.amazonaws.com/bulujono/bonivo.pdfIn PDF document text
    • https://s3.amazonaws.com/xezujuxoz/dear_evan_hansen_sincerely_me_sheet_music.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_off0000bc11.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xBC11 5572 bytes
SHA-256: a7a69f9a1caa42e78b265734abd21b21d7940382e9a9805a829b77705c9a794d
font_01_sfnt_off0000cf09.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCF09 9288 bytes
SHA-256: be4794815e5edd8b6889b58b76fe479f535bf12aeef2a2344b03d1e37e8d743c

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