Malicious PDF — malware analysis report

Static analysis result for SHA-256 2ba999709eaf7140…

MALICIOUS

PDF

87.3 KB Created: 2021-03-24 21:18:16 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-08-25
MD5: 31b8cf5fb9e113951cb3622c6de5eb8a SHA-1: aa2008d49992dd675377e8e448df671b3f98dcb7 SHA-256: 2ba999709eaf714043812023c9673b2bb0593934a7ca30a3024a7dcbc88aefab
136 Risk Score

Malware Insights

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

The PDF document contains a high-severity heuristic indicating it's an SEO redirector link, disguised as a free download lure. The primary URL, 'https://bologen.ru/wix?keyword=manual+metal+arc+welding+process', is flagged as suspicious. While no scripts were extracted, the PDF structure and the nature of the link strongly suggest a phishing or malware distribution attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9995

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
  • Image lure linking to an SEO redirector (free-download phishing) high PDF_SEO_UTM_REDIRECTOR_LINK
    PDF embeds an image with little or no body text and a clickable link to a multi-word utm_term / FeedBurner-proxied SEO redirector — the 'free ebook / solution-manual / document download' phishing family that ranks for natural-language search queries and routes the user into a payload/redirect chain. The PDF carries no exploit; the risk is the linked destination. Flagged structurally (image lure + SEO redirector) so it does not depend on a ClamAV/ML signature, and regardless of how many filler text pages the lure carries.
  • 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/wix?keyword=manual+metal+arc+welding+process PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4374860/normal_6012312c5ece3.pdfIn PDF document text
    • https://cdn.sqhk.co/jusupovexewa/iggjgi5/la_novella_east_meadow_reviews.pdfIn PDF document text
    • http://vufajed.getenjoyment.net/57556564475.pdfIn PDF document text
    • https://cdn.sqhk.co/pujunuzivas/hiZ1jgC/detutavubumezewabulerep.pdfIn PDF document text
    • https://putoxovomugov.weebly.com/uploads/1/3/0/7/130739063/6859409.pdfIn PDF document text
    • https://cdn.sqhk.co/fepexeguma/jogxjgL/35094061233.pdfIn PDF document text
    • https://gopiwalugase.weebly.com/uploads/1/3/0/7/130738825/8625bb875879.pdfIn PDF document text
    • https://wijugola.weebly.com/uploads/1/3/2/3/132303023/2306854.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4383446/normal_5fe81cf5d3364.pdfIn PDF document text
    • http://benivosefemiza.medianewsonline.com/music_in_theory_and_practice_9th_edition_workbook_answer_key.pdfIn PDF document text
    • https://kuwomodelinero.weebly.com/uploads/1/3/0/7/130776449/15f4bb0b7.pdfIn PDF document text
    • http://parazepurafeza.medianewsonline.com/arthur_andersen_case_study.pdfIn PDF document text
    • https://cdn.sqhk.co/mugegiduveb/ibpr9em/oklahoma_unemployment_benefits_extension.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://3d7c42e8-cad9-4196-8f3c-0f210fd97588.filesusr.com/ugd/1b7c00_977900d1f95947df90b9426c0006d39c.pdf?index=trueIn PDF document text
    • https://1628ddcf-e301-416d-9649-d9339b85441b.filesusr.com/ugd/0b1079_75d29b18a3884ab6bf1d979c3a7699a2.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/bubisifapagefe/tukikefe.pdfIn PDF document text
    • https://s3.amazonaws.com/badodemebo/nixiramabuj.pdfIn PDF document text
    • https://s3.amazonaws.com/mokuwanibof/bipap_stellar_150_manual.pdfIn PDF document text
    • https://s3.amazonaws.com/muwomapotumugi/minnesota_uniform_crime_report_2017.pdfIn PDF document text
    • https://s3.amazonaws.com/bifadiwuwileji/61113415106.pdfIn PDF document text
    • https://383fd46b-cc41-47b7-9379-19c19d7bb1fe.filesusr.com/ugd/81c43a_a6318e92166843b9a05cf77ab6473727.pdf?index=trueIn PDF document text
    • http://rosevasejila.myartsonline.com/zesegitofovuzipinune.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_off0001140d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1140D 5492 bytes
SHA-256: 092e9e53b0ab63e99791d94522542912b05b4b75f8341cf1d52ff47a198e4e08
font_01_sfnt_off000126c0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x126C0 12460 bytes
SHA-256: 4a946580127e3f0fb86a7cc1899c267d33a41de40c01b4725f693f7bb2a055c6