Malicious PDF — malware analysis report

Static analysis result for SHA-256 01b4518a66d63c04…

MALICIOUS

PDF

74.3 KB Created: 2021-05-12 21:01:31 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-24
MD5: 7978bb6e6b3651dd9f4f58d117bf4aaa SHA-1: 585fd937e52c6bde0f73e7393adc66885c7dcd30 SHA-256: 01b4518a66d63c04773246464e2cae8aedabfc69fdb412a1f02ee2168136d891
126 Risk Score

Malware Insights

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

This PDF document contains an external URI pointing to a suspicious URL, likely intended to redirect the user to a malicious site. The PDF_SEO_DISPOSABLE_LINK_FARM heuristic indicates the document is part of a link farm on disposable hosting, further suggesting a phishing or scam attempt. The ML classifier and ClamAV detection strongly indicate malicious intent, likely related to phishing or malware distribution.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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://mezovuduw.ru/strik?utm_term=how+to+change+a+wick+in+kerosene+heater PDF link annotation
    • https://bemafaparad.weebly.com/uploads/1/3/2/6/132681832/tefujaragodu.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4414515/normal_5fe74f62b66cb.pdfIn PDF document text
    • https://cdn.sqhk.co/ruwonumatag/c3hjzhh/new_instrumental_ringtone_2020_free_download.pdfIn PDF document text
    • https://cdn.sqhk.co/dovepomazeri/heijLif/53466495049.pdfIn PDF document text
    • https://cdn.sqhk.co/jakufomego/Q3Cvhic/20709293407.pdfIn PDF document text
    • http://bobiruropiles.22web.org/eau_guidelines_prostate_cancer_2017.pdfIn PDF document text
    • https://mebotorafegamor.weebly.com/uploads/1/3/0/7/130739377/69de34de093b140.pdfIn PDF document text
    • https://cdn.sqhk.co/mipijotom/caidjaF/driving_school_cheap_prices_near_me.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4488130/normal_5fde654e00b3e.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/duzexefemosaxe/lenerokita.pdfIn PDF document text
    • https://ee60c613-3dd1-430d-b711-08e3dcbf0273.filesusr.com/ugd/19ce5d_254e91b3f8c84af0918c10e2c7691f0c.pdf?index=trueIn PDF document text
    • http://sudatidi.epizy.com/16749190844.pdfIn PDF document text
    • https://b03e51a8-7171-48c0-94d6-e4c032e6f37f.filesusr.com/ugd/9421c8_e58e47feff1a4e3db376b5d4e78aa93a.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/fodose/13532670072.pdfIn PDF document text
    • http://dokidakalivuwel.rf.gd/how_to_switch_on_iphone_4s_with_battery_percentage.pdfIn PDF document text
    • http://vumesurev.epizy.com/3843084809.pdfIn PDF document text
    • http://zepinurubav.epizy.com/68643399152.pdfIn PDF document text
    • https://s3.amazonaws.com/tarajix/86370976280.pdfIn PDF document text
    • https://4abf464d-34d5-4c80-8de5-e64f30e04530.filesusr.com/ugd/8b3eb5_ccadb4492da94f44a124ea47725ba919.pdf?index=trueIn PDF document text
    • https://c36efdde-2309-4ce2-a10d-b6df2ce12cd8.filesusr.com/ugd/e98059_9c03483fc204409fab5a5a95717c4e1e.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/tafogusegabomu/hot_hikers_guide_to_the_galaxy_movie.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_off0000e757.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE757 5148 bytes
SHA-256: 7a30750ba67eda8e03c180d7ff73ebf656d3400cf48faa91b03b20fda0603ded
font_01_sfnt_off0000f8ea.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF8EA 10272 bytes
SHA-256: a8e8752760fa5f2e66b40da0b3d85059aa9df2cfc26ff837a864cd1f79c0bfe8

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