Malicious PDF — malware analysis report

Static analysis result for SHA-256 9fcc13601c90db07…

MALICIOUS

PDF

138.5 KB Created: 2021-04-05 09:15:40 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: eefe3c2da42f01df7d59d6e1aad29a0d SHA-1: 3b241b0d3558fa55213a826c2af33f7fb68c2b55 SHA-256: 9fcc13601c90db077f7235b3897ea4e1f2f6ffaf0391a455537920abbccd8a1b
156 Risk Score

Malware Insights

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

The PDF contains numerous external links, many pointing to Weebly-hosted PDFs, suggesting a link farm or phishing campaign. The ClamAV detection and ML classifier strongly indicate malicious intent, specifically a phishing or trojan distribution attempt. While no scripts were explicitly extracted, the PDF structure and numerous external URIs are indicative of malicious activity, likely leading to a second-stage download or credential harvesting.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9993

Heuristics 5

  • 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.
  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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://soxebez.ru/wix?keyword=sistema+planetario+solar+actual
    • https://xulozajewe.weebly.com/uploads/1/3/1/3/131384688/wuvadubut.pdf
    • https://kasorewo.weebly.com/uploads/1/3/2/7/132740312/3329821.pdf
    • https://darifojiwuz.weebly.com/uploads/1/3/4/5/134588766/5498226.pdf
    • http://manaxupupili.iblogger.org/sample_agenda_and_minutes_templates.pdf
    • http://newutatokulu.getenjoyment.net/jevukiw.pdf
    • https://cdn-cms.f-static.net/uploads/4407069/normal_6056845a26570.pdf
    • http://gugolufixa.mywebcommunity.org/libro_de_los_caballeros_templarios_de_michoacan.pdf
    • https://takimibovejexi.weebly.com/uploads/1/3/4/5/134512521/376131.pdf
    • https://cdn-cms.f-static.net/uploads/4493282/normal_6019c91b1afd8.pdf
    • https://static.s123-cdn-static.com/uploads/4380072/normal_5fe16c51833e7.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://s3.amazonaws.com/jifedefujodu/animator_job_information.pdf
    • https://aa3bb5c3-2bd4-4791-9e2a-6e31d5009b04.filesusr.com/ugd/60e703_9295aab9207a42f5af920b8fd10c8e87.pdf?index=true
    • http://wizuxamop.rf.gd/30781637897.pdf
    • https://s3.amazonaws.com/vedexajawo/sarotujesaxum.pdf
    • https://aa514bbb-a96e-4bc9-8ff3-0ca2edd1104f.filesusr.com/ugd/3fc21f_f9d14eb497334b329346dffc28a78469.pdf?index=true
    • http://fixadamobus.epizy.com/80357825193.pdf
    • https://91e55214-10ad-44cf-a10a-60a9392df58b.filesusr.com/ugd/e1c37d_5edd177b1d0b48e5a6998b239c3954ec.pdf?index=true
    • http://dipijiz.epizy.com/agile_testing_lisa_crispin_janet_gregory.pdf
    • https://s3.amazonaws.com/najubu/piwirabezeza.pdf
    • http://xizokenimufewom.atwebpages.com/22352796925.pdf
    • https://b73b9701-b1df-43be-b031-73419f87697c.filesusr.com/ugd/bfbd96_b43dd094e1174326a4c91210ad3913b1.pdf?index=true
    • https://48e6b720-b653-4920-beb0-7ef171ab6ab9.filesusr.com/ugd/d9d1f5_034aa68c9ac546579b1ab893453fc462.pdf?index=true
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/
    • http://scripts.sil.org/OFL
    • http://dejavu.sourceforge.net
    • http://dejavu.sourceforge.net/wiki/index.php/License

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0001c3c4.bin
bc79292c0d5dfc0f105a8793a6291ea3a8b3ee7ad75ba931a157d3cd0e1778d6		 pdf-font-stream PDF embedded font (sfnt) at offset 0x1C3C4 5180 bytes
font_01_sfnt_off0001d544.bin
b901ae186f656375409afa693edd32ff14f028b62ad817549225db46bd316cfa		 pdf-font-stream PDF embedded font (sfnt) at offset 0x1D544 14772 bytes
font_02_sfnt_off000204cd.bin
a1d034c4899da820a17195885c2d76cd6be3fce17d3f1660d9b3805b34643d2d		 pdf-font-stream PDF embedded font (sfnt) at offset 0x204CD 16272 bytes

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