Malicious PDF — malware analysis report

Static analysis result for SHA-256 1e106425a7a984d5…

MALICIOUS

PDF

73.4 KB Created: 2021-03-03 11:49:45 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-06-04
MD5: e77327d754273028a058741e20a615ca SHA-1: 6e0ec89ebf279a023e2b7c2f8872e035c809ae6a SHA-256: 1e106425a7a984d55db6234162fa4651ceb656acf6949d084818f411c8263a05
126 Risk Score

Malware Insights

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

This PDF file was flagged by multiple heuristics, including a critical ClamAV detection for 'Pdf.Phishing.Trojan'. The presence of numerous external URLs, many hosted on disposable domains, suggests a link farm designed to redirect users to malicious content. The ML classifier also strongly indicated maliciousness. While no scripts were explicitly extracted, the PDF structure and embedded URLs point towards a phishing or malware distribution attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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://maypoin.ru/wix?keyword=rapid+identity+ncedcloud PDF link annotation
    • https://xikoroto.weebly.com/uploads/1/3/4/3/134338579/c15996ff38cad37.pdfIn PDF document text
    • https://japafapu.weebly.com/uploads/1/3/1/4/131437770/nafedojopozat_puxulugiwusev.pdfIn PDF document text
    • http://idealica-italiaoficial.site/lg_inverter_direct_drive_washing_machine_manualxesvd.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4443801/normal_600babca06222.pdfIn PDF document text
    • https://gejodawutu.weebly.com/uploads/1/3/1/1/131164152/relanuzu.pdfIn PDF document text
    • http://fb-copyright-help-from.com/mamadelapalogewiwedikdrjz8.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4482190/normal_6026a37d0926d.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4371783/normal_60277ff646085.pdfIn PDF document text
    • https://lobakazuperowe.weebly.com/uploads/1/3/4/3/134352895/tatenepozufetogi.pdfIn PDF document text
    • https://pememeva.weebly.com/uploads/1/3/0/8/130874233/fifatazug-geparizuvum-fukejakugutawil.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4418188/normal_60302921a91c9.pdfIn PDF document text
    • http://it50disconto.info/difference_between_viral_and_bacterial_infection_throat4jova.pdfIn PDF document text
    • http://gufolitif.22web.org/funeral_home_program_templates.pdfIn PDF document text
    • https://totijavefukaja.weebly.com/uploads/1/3/4/7/134705726/xefumakogemubo-jarewipetu-wororujasal.pdfIn PDF document text
    • http://rodojad.iblogger.org/finding_time_compound_interest_formula.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4487632/normal_60018fe678cc1.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4403687/normal_5fd0839b5c75c.pdfIn PDF document text
    • https://tanavizone.weebly.com/uploads/1/3/4/7/134709943/rabobugen.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://lifanijuw.epizy.com/zipivi.pdfIn PDF document text
    • http://nesazovopiw.rf.gd/panelview_1000e_manual.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_off0000e532.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE532 4904 bytes
SHA-256: fe64b64d8071b0c7dcd3f8bea4911f0033a7d8fd5f119641e8df920b67f1797f
font_01_sfnt_off0000f605.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF605 9992 bytes
SHA-256: eb482f9a879d73c902a7fac131b6f46d5b82dd5402a0863eeaa05fc9231b0907

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