Malicious PDF — malware analysis report

Static analysis result for SHA-256 f338f30d248b7f4a…

MALICIOUS

PDF

72.8 KB Created: 2021-02-12 08:17:43 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-08-20
MD5: 67fc71ca977f36ad6aef7daa2f9e3a00 SHA-1: dedc044293a28df7aaae4e303d39463f38729be7 SHA-256: f338f30d248b7f4ad13158e40a246bbced4d16f2db8c4f685b61ca5285e4cf2f
126 Risk Score

Malware Insights

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

The PDF contains numerous embedded URIs and is flagged by heuristics as a link farm, suggesting a phishing or SEO manipulation scheme. The ML classifier and ClamAV detection strongly indicate malicious intent. While no scripts were explicitly extracted, the PDF structure and embedded links are indicative of malicious activity, likely leading to further compromise or credential harvesting.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

Heuristics 5

  • 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 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://leonvi.ru/wix?keyword=arvada+high+school+yearbook PDF link annotation
    • https://betebawaxudu.weebly.com/uploads/1/3/5/3/135388356/2383761.pdfIn PDF document text
    • https://cdn.sqhk.co/wazotifuk/dNjgoha/30261976454.pdfIn PDF document text
    • https://maviwodoke.weebly.com/uploads/1/3/1/6/131606431/wevawafokofu.pdfIn PDF document text
    • http://dreabling.online/new_bollywood_full_movies_free_2018dizcg.pdfIn PDF document text
    • https://cdn.sqhk.co/vupapevixu/cUyhV8b/the_lone_survivor_movie_cast.pdfIn PDF document text
    • https://xulasimij.weebly.com/uploads/1/3/2/8/132814518/5238875.pdfIn PDF document text
    • https://cdn.sqhk.co/jeporikate/dpgijjh/kikixatibafu.pdfIn PDF document text
    • https://vokubopupabilu.weebly.com/uploads/1/3/4/6/134691430/kitujifiwuwesu.pdfIn PDF document text
    • http://rutidewebatodug.iblogger.org/ladijiliwuwuvogaze.pdfIn PDF document text
    • http://fuluwube.22web.org/zofup.pdfIn PDF document text
    • http://tegor.xyz/pdf_ccna_200-_125_study_guidenalm4.pdfIn PDF document text
    • https://sagopitura.weebly.com/uploads/1/3/1/1/131164573/nekepivarozizok_taxozobo_xevitu.pdfIn PDF document text
    • https://nufapapezo.weebly.com/uploads/1/3/0/9/130969462/zokokubolex-neriname-demijofowuniz.pdfIn PDF document text
    • https://cdn.sqhk.co/gefimiwotux/chgjaBe/farm_heroes_saga_game_free_download_for_pc.pdfIn PDF document text
    • https://cdn.sqhk.co/satofapo/An1jfgj/start_em_sit_em_wr_week_8.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://jefevuxivux.epizy.com/6313354574.pdfIn PDF document text
    • http://badokelo.rf.gd/tesisosakowewijiwoke.pdfIn PDF document text
    • http://wijegasijewen.rf.gd/centrica_annual_report_2009.pdfIn PDF document text
    • http://likoxupukizagan.rf.gd/91314328798.pdfIn PDF document text
    • http://vejabimumen.epizy.com/varaxepenafozomejosapat.pdfIn PDF document text
    • http://xorikija.epizy.com/bold_text_span_android.pdfIn PDF document text
    • http://gofirog.epizy.com/fujepetarenoriwe.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_off0000decf.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDECF 5556 bytes
SHA-256: 9f0107eee4c750f851277d2479ba1f46dac80466e150236e4f6309dc40b422d4
font_01_sfnt_off0000f1be.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF1BE 10616 bytes
SHA-256: 1750e9f51b6d5e669fa2a6d3081f850dc301db39e4fdbe057144ac37fab04a40

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