Malicious PDF — malware analysis report

Static analysis result for SHA-256 2ec30d0fa2479581…

MALICIOUS

PDF

81.2 KB Created: 2021-02-15 03:01:37 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-22
MD5: 35c1d127689be2ee0de2b445a061e335 SHA-1: cc71261e36483046f6f594cfee39521742b697d6 SHA-256: 2ec30d0fa2479581740df29a5ef2a8b90c6f8621df01924dbf78b2822e4bcbd4
126 Risk Score

Malware Insights

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

The PDF contains numerous embedded URLs, many pointing to disposable domains and link farms, indicating a phishing or malware distribution attempt. The ML classifier and ClamAV detection strongly suggest malicious intent. While no scripts were explicitly extracted, the PDF structure and embedded links are consistent with techniques used to redirect users to malicious sites.

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 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://bologen.ru/wix?keyword=where+to+get+clay+in+skyrim PDF link annotation
    • https://cdn.sqhk.co/jekefebiba/S3vyhjU/96087216790.pdfIn PDF document text
    • http://bukivagixunok.22web.org/workplace_diversity_journal.pdfIn PDF document text
    • https://cdn.sqhk.co/nanuvoxeva/jiiFjgQ/38318400131.pdfIn PDF document text
    • http://gidpopiteru.com/vusawezepen9xz7.pdfIn PDF document text
    • http://reduslimitaly-official.website/video_editor_online_free_download5bimc.pdfIn PDF document text
    • http://rfs.team/overcoming_fear_of_failure_worksheet07fnb.pdfIn PDF document text
    • https://cdn.sqhk.co/mopewedote/eLhdhbP/nezagujinafubojajopit.pdfIn PDF document text
    • http://reestr.site/98068044108ny707.pdfIn PDF document text
    • http://itsamorem.com/mai_tai_diffords_guidekk7s5.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/sojuravewi/vukowi.pdfIn PDF document text
    • https://s3.amazonaws.com/gurupixabogivaz/roserub.pdfIn PDF document text
    • https://s3.amazonaws.com/tarizirefevifab/jagumesikijisegegovixesig.pdfIn PDF document text
    • https://s3.amazonaws.com/tezofuretejom/weathering_erosion_and_deposition_worksheet_5th_grade.pdfIn PDF document text
    • http://xaganifexoba.epizy.com/35382407744.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_off00010006.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10006 5392 bytes
SHA-256: 2a65242f642fec0665da3c9a081f922898971d1574d7e759a1094c9e4b148693
font_01_sfnt_off0001124c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1124C 10944 bytes
SHA-256: 22ad20332b56feaf51350ca9814c059ad134f0dc86d1f842f468fa56070939e9

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