Malicious PDF — malware analysis report

Static analysis result for SHA-256 ebab68c4b3eda849…

MALICIOUS

PDF

82.6 KB Created: 2021-03-25 01:58:46 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-23
MD5: 7089a8326c16b9ed41321d45be9f053e SHA-1: de4f3a4971714f896f3973b8118fc40b70cb5975 SHA-256: ebab68c4b3eda8499f36d0d4a04057d30e643c9dbfbfb06d987cac2a666c6715
126 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

This PDF document was flagged as malicious by ClamAV and an ML classifier. The file embeds a large number of external links characteristic of an SEO link farm. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9961

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://bologen.ru/strik?utm_term=distress+tolerance+worksheets+accepts PDF link annotation
    • http://antileqphh.site/canon_scangear_starter_lide_25_freed9no6.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4463300/normal_5fc9899044459.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4486220/normal_60223d730b5f1.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4500183/normal_60413f071c901.pdfIn PDF document text
    • http://zuxotit.iblogger.org/oppositional_defiant_disorder_dsm_5.pdfIn PDF document text
    • http://wexypay.icu/dusilomarulizuvadogiufe4o.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4394066/normal_5fe667174c045.pdfIn PDF document text
    • http://pixxel.life/simulacro_de_evacuacin_escolary4tf5.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4485436/normal_60437a2bb80f2.pdfIn PDF document text
    • http://support-copyrighthelpservice-about.com/grokking_deep_reinforcement_learning_githubgldcl.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://tobekiginekafo.epizy.com/common_acids_and_bases.pdfIn PDF document text
    • https://f85e9a30-dbb9-40fd-a66d-53bd7daafe07.filesusr.com/ugd/1b9faa_05ec5406346f4e2790e4a6e96649596f.pdf?index=trueIn PDF document text
    • http://komoxabe.epizy.com/jixonurologesenowef.pdfIn PDF document text
    • http://jopewadakos.epizy.com/mixed_conditionals_exercises_with_answers.pdfIn PDF document text
    • https://eaae50f7-3b1c-4f1b-9b3c-e2a48377569d.filesusr.com/ugd/b96e41_ba1f39d6022242069815d54801e79dda.pdf?index=trueIn PDF document text
    • http://jofawapedoguw.rf.gd/angielski_gramatyka_edgard.pdfIn PDF document text
    • https://s3.amazonaws.com/gekixadonuru/lorex_eco2_firmware_update.pdfIn PDF document text
    • https://0c241ebc-151b-48bf-a4db-a9f2ee65d67b.filesusr.com/ugd/c17081_c15f9df034da4e0aa68ac3b7b9a84775.pdf?index=trueIn PDF document text
    • http://nupituf.epizy.com/7196498825.pdfIn PDF document text
    • https://s3.amazonaws.com/legenapi/allen_bradley_525_vfd_user_manual.pdfIn PDF document text
    • http://zaxutakizet.epizy.com/13031079410.pdfIn PDF document text
    • https://c6de0af5-2a4c-46da-924c-839bccb102c6.filesusr.com/ugd/5f1f0f_f3794ca09f9447a8b2ddbc7c70f16847.pdf?index=trueIn PDF document text
    • https://275320ff-96dd-455a-9699-a0fdc58b27a5.filesusr.com/ugd/943725_2e54e3b379b34999936f5287b47bc4f5.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/lebaxa/aisha_film_video_songs.pdfIn PDF document text
    • https://s3.amazonaws.com/jobavo/53273496203.pdfIn PDF document text
    • https://s3.amazonaws.com/widetunipet/template_confidentiality_clause.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_off00010373.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10373 5176 bytes
SHA-256: 2da368882f317cab3ce03971d229103fdc7b46aa6c28b86dfb9c3c9e037997d3
font_01_sfnt_off00011523.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11523 11052 bytes
SHA-256: d7fec85dfe1da90b182ca2f60dbb80dc79522ce7c0c516e8b8156d906e829936

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