Malicious PDF — malware analysis report

Static analysis result for SHA-256 b0bddf9f36da877f…

MALICIOUS

PDF

92.9 KB Created: 2021-06-01 03:48:05 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-07-02
MD5: 11e7b57f9359cd227af03aefb3e27e6f SHA-1: 94c1bcfc5794233e3da6360af0391394726cd5cb SHA-256: b0bddf9f36da877fed65f0ae03962e55df9f0324cb27cc81272c19dd19694556
186 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

This PDF file was flagged as malicious by both ML classifiers and ClamAV, indicating a high likelihood of malicious intent. It contains a large number of external links, many hosted on disposable domains, suggesting a link farm or phishing operation. The presence of external URIs and the overall structure point towards a malicious document designed to redirect users to potentially harmful content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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://archism.ru/pbw?utm_term=toolbox+killers+audio+tape+transcript PDF link annotation
    • https://gavatuwideziwi.weebly.com/uploads/1/3/4/3/134352821/1d36e8c.pdfIn PDF document text
    • https://livaruzurakit.weebly.com/uploads/1/3/4/4/134432061/misogifegokid.pdfIn PDF document text
    • https://visuriteja.weebly.com/uploads/1/3/5/3/135323353/4317115.pdfIn PDF document text
    • https://konegodifoxud.weebly.com/uploads/1/3/1/3/131380175/sewuvadejinelit_komomijuj_taxunowutula_kefax.pdfIn PDF document text
    • https://xanavixigusom.weebly.com/uploads/1/3/1/4/131453194/kilesajulamapi.pdfIn PDF document text
    • https://tubanepa.weebly.com/uploads/1/3/2/7/132740320/80e6ec2.pdfIn PDF document text
    • https://jadusozig.weebly.com/uploads/1/3/5/3/135327359/zogonolepar_paxumivegu_lepiled_magofekosifoki.pdfIn PDF document text
    • https://dupevolorimix.weebly.com/uploads/1/3/4/5/134588768/68e2cbe3b7b82.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://veweran.pbworks.com/f/how_to_fill_tcs_bgc_form.pdfIn PDF document text
    • http://fufitiruw.pbworks.com/w/file/fetch/144426672/how_do_i_update_my_moultrie_camera_firmware.pdfIn PDF document text
    • http://jesababa.pbworks.com/w/file/fetch/144416433/famous_quotes_on_friendship_in_marathi.pdfIn PDF document text
    • http://tazijebep.pbworks.com/f/31668424543.pdfIn PDF document text
    • http://midevodimu.pbworks.com/f/dikova.pdfIn PDF document text
    • http://ziduzobif.pbworks.com/f/modern_chemistry_chapter_18_section_2_review_answers.pdfIn PDF document text
    • http://zogekinovag.pbworks.com/w/file/fetch/144437271/raribivopepuf.pdfIn PDF document text
    • http://kufogokoges.pbworks.com/w/file/fetch/144434946/kakariruseguxoriv.pdfIn PDF document text
    • http://bovojigu.pbworks.com/f/zusetobitasunalejimona.pdfIn PDF document text
    • http://vawaguzidatu.pbworks.com/f/gta_5_psp_download_highly_compressed.pdfIn PDF document text
    • http://fulusivijomu.pbworks.com/f/dhruva_sarja_songs_mp3_download.pdfIn PDF document text
    • http://degenazi.pbworks.com/w/file/fetch/144433020/how_to_prevent_water_borne_diseases_ppt.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_off00012bb3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12BB3 5288 bytes
SHA-256: ef7f368ea7a246ecbe632f7e8fbf3bb94dc5eb601707563c25538d305c5c8b95
font_01_sfnt_off00013db4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13DB4 11624 bytes
SHA-256: 90433d7eb828e7e86273be12e832d934af90b5082f5cce84f44b0194ef8f2405

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