Malicious PDF — malware analysis report

Static analysis result for SHA-256 079c157ef0d976a3…

MALICIOUS

PDF

71.8 KB Created: 2021-02-25 05:07:57 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-06-05
MD5: 7754bb764006cbaea95f3780aae8726f SHA-1: edc7b92ce28c69f3eeb5f7184b26ca32f643c293 SHA-256: 079c157ef0d976a3a00b59859999d18764a96e237768ddcf6e4c9ab6b2f4ba08
126 Risk Score

Malware Insights

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

The PDF document contains embedded URLs and is flagged by multiple heuristics, including a critical ClamAV detection for 'Pdf.Phishing.Trojan'. The document body, though heavily obfuscated, suggests a lure related to checking reading grade levels in Word 2010, directing users to a suspicious URL. The presence of numerous embedded URLs and the ML classifier output strongly indicate malicious intent, likely phishing or malware distribution.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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://druttle.ru/award?keyword=how+to+check+reading+grade+level+in+word+2010 PDF link annotation
    • http://dovulup.iblogger.org/jidaxesaxi.pdfIn PDF document text
    • http://sakabeg.iblogger.org/gogemilo.pdfIn PDF document text
    • http://rexevivejegox.scienceontheweb.net/39345895968.pdfIn PDF document text
    • http://fekevopimibun.sportsontheweb.net/jowotikip.pdfIn PDF document text
    • https://cdn.sqhk.co/vofudejobif/gcqr7if/bezafapiluposuvetowudefi.pdfIn PDF document text
    • https://cdn.sqhk.co/tigafita/ghghhc5/does_he_like_me_quiz_playbuzz.pdfIn PDF document text
    • https://cdn.sqhk.co/bikegola/ghjjbgh/70553630587.pdfIn PDF document text
    • https://cdn.sqhk.co/tevimuwijile/S3NVeif/debt_snowball_calculator_app.pdfIn PDF document text
    • http://wagekelazutus.22web.org/97279636835.pdfIn PDF document text
    • http://bitasifo.22web.org/mulosivizet.pdfIn PDF document text
    • http://xemepuvaxeliv.iblogger.org/jejiwema.pdfIn PDF document text
    • https://cdn.sqhk.co/fofodafexadu/qgd4wEi/zuxudegaxuzivasesazutotu.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/ganubifirigevi/lobemo.pdfIn PDF document text
    • https://s3.amazonaws.com/nijosinizo/43469324321.pdfIn PDF document text
    • http://dodudulu.epizy.com/origin_of_word_answerable.pdfIn PDF document text
    • http://zowipazivavi.epizy.com/bevoruzone.pdfIn PDF document text
    • http://buwumipulufi.epizy.com/libro_adonay_jorge_adoum.pdfIn PDF document text
    • http://rogofideb.onlinewebshop.net/rugoxate.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_off0000dbac.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDBAC 5524 bytes
SHA-256: 04979c856260e73d87ec81990006d40b7fff17dae9a6896cb3ba1bb5c56050ab
font_01_sfnt_off0000ee8c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEE8C 10384 bytes
SHA-256: 64ffb05fbb39cd5afd53ad67dab047afeca6d3439fd6fc8dae5825726e100965

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