Malicious PDF — malware analysis report

Static analysis result for SHA-256 ff9ae80abacc5510…

MALICIOUS

PDF

79.6 KB Created: 2021-02-23 03:22:19 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-29
MD5: f732fc61082ce069e4046101b71b3906 SHA-1: 4980bc41377cbc2dcf70e6af383c27de87594b79 SHA-256: ff9ae80abacc5510a04581efbc8d977da81dd6079ff8152a4d84eb67ccd6ceab
126 Risk Score

Malware Insights

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

The PDF file contains numerous embedded URLs, many pointing to disposable domains and link farms, indicating a phishing or redirection attempt. The heuristic 'PDF_SEO_DISPOSABLE_LINK_FARM' and the presence of external URIs strongly suggest malicious intent. Although no scripts were explicitly extracted, the PDF structure and embedded links are characteristic of phishing lures designed to trick users into visiting 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://seumenha.ru/wb?keyword=how%20to%20fix%20a%20portable%20dishwasher%20that%20won PDF link annotation
    • https://wexabegolorumad.weebly.com/uploads/1/3/4/3/134351445/9403004.pdfIn PDF document text
    • https://nadaroxiwe.weebly.com/uploads/1/3/4/6/134688146/c08a61c876e67.pdfIn PDF document text
    • https://bipuwuvi.weebly.com/uploads/1/3/0/7/130776795/5854211.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4465007/normal_5fc9c2b2e7e1e.pdfIn PDF document text
    • https://lonamejekewow.weebly.com/uploads/1/3/5/3/135396766/nanuw-ripanidezidul.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4402944/normal_5fd36b7f5c737.pdfIn PDF document text
    • http://suxiselukex.66ghz.com/cnet_s_safe_site.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4412774/normal_5fe312510cc44.pdfIn PDF document text
    • https://merasewutid.weebly.com/uploads/1/3/4/3/134348660/11b02792f896.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • https://s3.amazonaws.com/muvarelo/8581848093.pdfIn PDF document text
    • http://tazuwaxerufuje.epizy.com/87061240096.pdfIn PDF document text
    • https://s3.amazonaws.com/jivuxo/metodologia_de_la_investigacion_juridica_jose_carrillo_mayorga.pdfIn PDF document text
    • http://witosef.rf.gd/wilakababupobugemimemet.pdfIn PDF document text
    • http://bosurigazo.epizy.com/6348497184.pdfIn PDF document text
    • http://fovorixeduwudu.epizy.com/abac_spinn_air_compressor_manual.pdfIn PDF document text
    • http://fivexuto.rf.gd/computer_basics_worksheet_section_12.pdfIn PDF document text
    • https://s3.amazonaws.com/zuguvoxoki/ponufonogodi.pdfIn PDF document text
    • http://gedanenek.epizy.com/checkpoint_5600_firewall_datasheet.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_off0000ed23.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xED23 5212 bytes
SHA-256: db8c398d03a347bb421af989219fd91767867eff9918d364f2990e434b4844f5
font_01_sfnt_off0000fedd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFEDD 10696 bytes
SHA-256: 1cc701e473f438e520f8e8834b4becce2be46d0b509b093b4c15cb55956ebd05
font_02_sfnt_off0001226b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1226B 4324 bytes
SHA-256: 1062cd8ddf90f4344fa193b395386d5669df1a952e5759311ca261a71931f361

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