Malicious PDF — malware analysis report

Static analysis result for SHA-256 e9208e0c51234702…

MALICIOUS

PDF

72.6 KB Created: 2021-02-25 07:36:47 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-29
MD5: 0825905cc62e247af9835c15e7568fec SHA-1: 4d1dd566443b01d291a86bb8d50a12b7001e21f6 SHA-256: e9208e0c51234702e2491ce66b12707ad954e65d95226d543fab45c0abb13cfb
126 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

The PDF file was flagged by multiple heuristics, including a machine learning classifier and ClamAV, as malicious and likely phishing-related. It contains numerous embedded URLs, many pointing to disposable domains, suggesting a link farm designed to redirect users to malicious content. The presence of external URIs and the 'PDF_SEO_DISPOSABLE_LINK_FARM' heuristic strongly indicate an attempt to distribute malware or conduct phishing attacks.

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://druttle.ru/award?keyword=weedeater+featherlite+sst25ce+carburetor PDF link annotation
    • https://wotuvinuvokotar.weebly.com/uploads/1/3/5/3/135330473/1544882.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4478148/normal_5ffd7a3ace327.pdfIn PDF document text
    • http://xivitej.66ghz.com/pixutono.pdfIn PDF document text
    • https://lurevovikofa.weebly.com/uploads/1/3/4/6/134693735/9464717.pdfIn PDF document text
    • https://bijejumutitin.weebly.com/uploads/1/3/1/4/131454352/xivik-taxiz.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4531523/normal_5feb3fe2a6d89.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4481059/normal_6015af8dd6633.pdfIn PDF document text
    • http://lunurapezos.iblogger.org/bivofaduse.pdfIn PDF document text
    • https://pozimifekof.weebly.com/uploads/1/3/4/6/134674510/dutawig.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://kivudul.rf.gd/diary_of_a_wimpy_kid_long_haul_full_movie_dailymotion.pdfIn PDF document text
    • http://pejigevug.rf.gd/vefebilinokedopetekiji.pdfIn PDF document text
    • http://sabukizazuse.epizy.com/math_algebra_worksheets_6th_grade.pdfIn PDF document text
    • http://gesovupa.epizy.com/silunodulokagixafexop.pdfIn PDF document text
    • http://vixaxupofu.rf.gd/1617490035.pdfIn PDF document text
    • http://povuputuk.epizy.com/java_se_tutorial_oracle.pdfIn PDF document text
    • https://s3.amazonaws.com/nabifovu/secret_video_recorder_apk_pro.pdfIn PDF document text
    • http://tubefebu.epizy.com/57951157271.pdfIn PDF document text
    • http://luzeparuzibez.rf.gd/50095337081.pdfIn PDF document text
    • http://volapubexu.epizy.com/bisacodyl_davis_drug.pdfIn PDF document text
    • https://s3.amazonaws.com/tanikanaw/25518002732.pdfIn PDF document text
    • http://kewumexor.epizy.com/creating_a_fillable_form_template_in_word.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

Related samples 8

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000d88a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD88A 5516 bytes
SHA-256: 46653e12cdd9d93c7b3f900b1c9e7408d9cef5b2eadbb520a877deadf15b56ab
font_01_sfnt_off0000eb5e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEB5E 12892 bytes
SHA-256: 2b8b144913ca104fa68dae938e654975bae9ab537830a482981b306e3c20f86e

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