Malicious PDF — malware analysis report

Static analysis result for SHA-256 b02b14d17c12536f…

MALICIOUS

PDF

101.5 KB Created: 2021-03-25 12:57:08 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-25
MD5: f007b8494121991c91fa5058dd88121d SHA-1: bade6c05871f511ca6ac78de06bd74f8a5a9023d SHA-256: b02b14d17c12536f1761f9175cf21f5a775e6ff3f315d535929f004a58392f88
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 hosting, and is flagged by heuristics as a link farm designed for SEO manipulation. ClamAV detection and ML classification strongly indicate malicious intent, likely for phishing or malware distribution. The presence of external URIs suggests an attempt to redirect the user to a malicious site.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9945

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://seumenha.ru/award?keyword=advanced+engineering+mathematics+by+rk+jain+srk+iyengar+solutions+pdf PDF link annotation
    • http://dopenukivo.22web.org/12318320750.pdfIn PDF document text
    • https://cdn.sqhk.co/ragejeli/KMQPpij/disorderly_conduct_definition.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4453563/normal_604e0a6670264.pdfIn PDF document text
    • https://daradila.weebly.com/uploads/1/3/1/4/131438164/wurofarek-ponewen-vevirofu.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4368745/normal_603c04cfc3933.pdfIn PDF document text
    • https://cdn.sqhk.co/kajurineg/gM5gBuj/milunizidelami.pdfIn PDF document text
    • https://litukepulaj.weebly.com/uploads/1/3/4/8/134863372/9279284.pdfIn PDF document text
    • http://useporte.xyz/what_were_three_main_points_of_the_declaration_of_independencesxyjl.pdfIn PDF document text
    • https://livabobuladezer.weebly.com/uploads/1/3/0/8/130874084/lasifo-retumo.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4465701/normal_5fe02f4bacaea.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4412758/normal_5ff71521b2a8f.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4367665/normal_601734a28a000.pdfIn PDF document text
    • https://cdn.sqhk.co/livatunozasu/jwhcsxg/68923781047.pdfIn PDF document text
    • http://fdvsefwfrw.space/colliers_minneapolis_industrial_reportwvw3k.pdfIn PDF document text
    • https://cdn.sqhk.co/juviwonu/AhihfnA/relative_clauses_worksheet.pdfIn PDF document text
    • http://jibesikore.iblogger.org/wirazibobaj.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4502268/normal_5fc7a054cf088.pdfIn PDF document text
    • https://vizexetu.weebly.com/uploads/1/3/4/8/134864552/tekanolexos_kuzejabu.pdfIn PDF document text
    • https://suwesinorilofev.weebly.com/uploads/1/3/4/0/134096988/rudoga_fijef_makun.pdfIn PDF document text
    • https://cdn.sqhk.co/nenafodud/diihdzV/basketball_mini_hoop_nba.pdfIn PDF document text
    • http://bbflowers.net/steelers_week_8_injury_reportv6uks.pdfIn PDF document text
    • http://consumer-data-protection-bureau.com/how_to_use_a_blanketzbz6i.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4370547/normal_605c2ca377ffe.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://puxugizotivevi.epizy.com/acrobat_reader_update.pdfIn PDF document text
    • http://fifomivosa.rf.gd/javascript_date_print_format.pdfIn PDF document text
    • http://jopizegumi.rf.gd/21036036280.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_off00013dda.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13DDA 3144 bytes
SHA-256: f7a613fda5ba50e51826cd50f69fcbe6c52e8b39af481034a561189469b0d3cf
font_01_sfnt_off00014916.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x14916 6000 bytes
SHA-256: 77ff6f4ce43910c4f466011121f77cb63098ce354b7f4c70e22c70cddf157675
font_02_sfnt_off00015d6e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x15D6E 11660 bytes
SHA-256: 8a6ecadb9fa00465d332be5ae559e8a712c20ffe0143ebaf9c9202e8167096a2