Malicious PDF — malware analysis report

Static analysis result for SHA-256 eef7bce6218d1d3b…

MALICIOUS

PDF

74.2 KB Created: 2021-03-22 00:18:24 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-24
MD5: 31a3846dbc084cb96b6e15ba53fc84d5 SHA-1: 3db77ccf8bd85d7e9a2da24d4ab5c781ac79003e SHA-256: eef7bce6218d1d3ba32a51b927c0b95c06d5727750f235789bda3f8092ce538d
126 Risk Score

Malware Insights

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

The PDF file contains numerous embedded URLs, many of which point to disposable hosting and are associated with link farms, indicating a phishing or malware distribution attempt. The ML classifier and ClamAV detection strongly suggest malicious intent. Although no scripts were explicitly extracted, the PDF structure and embedded URIs are indicative of a common phishing lure.

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://xajibur.ru/123?utm_term=weather+report+big+cottonwood+canyon PDF link annotation
    • http://zizowifajazabor.22web.org/what_do_brown_bear_mean.pdfIn PDF document text
    • http://bandalet.club/listening_test_4_birth_statistics_answerstk65k.pdfIn PDF document text
    • http://myshoes.moscow/avis_sur_le_centre_de_formation_europeny8f69.pdfIn PDF document text
    • http://claire-irk.ru/job_description_of_restaurant_operations_managerh9s8r.pdfIn PDF document text
    • https://sogatetemurus.weebly.com/uploads/1/3/4/3/134379625/9419636a.pdfIn PDF document text
    • https://felinabaf.weebly.com/uploads/1/3/4/3/134380667/fe63d4b8d0708.pdfIn PDF document text
    • http://kesomud.iblogger.org/jason_and_the_argonauts_2000_harpies.pdfIn PDF document text
    • http://study-english-04.space/nixikiranufulairf.pdfIn PDF document text
    • https://molawaxurot.weebly.com/uploads/1/3/4/6/134699933/790f142f4d65690.pdfIn PDF document text
    • http://1xbet-registr.site/vishnu_sahasranamam_names_in_telugu5gbvl.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://uploads.strikinglycdn.com/files/e15e35db-9365-4816-9749-64e0e9e3817a/pezirivemakozesesawi.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/aa6ebeab-5775-4586-b6a5-87230f19a4d1/48079843801.pdfIn PDF document text
    • http://zekumom.epizy.com/free_infographics_template_after_effects.pdfIn PDF document text
    • http://bolutiso.epizy.com/avid_media_composer_first_tutorial.pdfIn PDF document text
    • http://gatezuzemup.epizy.com/quadratic_formula_powerpoint.pdfIn PDF document text
    • https://s3.amazonaws.com/vibuvomomuv/what_do_you_mean_by_community_development_banks.pdfIn PDF document text
    • http://niwemepog.epizy.com/32194822829.pdfIn PDF document text
    • https://s3.amazonaws.com/boxalewijim/vulixanubagarel.pdfIn PDF document text
    • https://s3.amazonaws.com/jozetej/60965821510.pdfIn PDF document text
    • https://s3.amazonaws.com/jidosatikim/68742175871.pdfIn PDF document text
    • https://s3.amazonaws.com/fuwuzerijofa/lulokasabiwolivelutidafen.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_off0000e1f4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE1F4 5472 bytes
SHA-256: d11d192c72274ccae18a2c3e7e8f8700eca2f34907f6b93b7eddf4d146542b22
font_01_sfnt_off0000f4a3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF4A3 11368 bytes
SHA-256: 0152a5ac50c4eaffb9cba54e84ad768f7c0e5827c131f4f9f6fb9c5db474041c

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