Malicious PDF — malware analysis report

Static analysis result for SHA-256 532e0c21bf29585b…

MALICIOUS

PDF

135.3 KB Created: 2021-01-27 23:50:11 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-18
MD5: 0210c9201f12a0294365b12721976866 SHA-1: 09cf19526deee784eecaef4115142faf7febe0a7 SHA-256: 532e0c21bf29585bcb0387fcb55f104bc1fb534f48446b73051ab9b4d0dfb816
126 Risk Score

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 0.9998

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://baarspo.ru/123?utm_term=how+to+export+video+davinci+resolve+15 PDF link annotation
    • http://sibuvre.com/bevajefoliwonuzoliu2o57.pdfIn PDF document text
    • http://fusubakitakudup.66ghz.com/78324468865.pdfIn PDF document text
    • http://naturalik.fun/your_guide_tv_bendigoyuo43.pdfIn PDF document text
    • http://vermono.site/ias_topper_notes_in_hindi_mediuma2c53.pdfIn PDF document text
    • http://maykistore.ru/burofowikaletitokibab76zna.pdfIn PDF document text
    • http://polnews.xyz/7153928361me0o5.pdfIn PDF document text
    • http://fredo.run/stick_ranger_wiki_classesekpnf.pdfIn PDF document text
    • http://0fruit.space/free_music_apps_for_iphonev7sel.pdfIn PDF document text
    • http://vukosam.22web.org/85676151122.pdfIn PDF document text
    • http://wide-mean.top/824400567029k56n.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://gulavofi.epizy.com/debit_card_template_sketch.pdfIn PDF document text
    • https://s3.amazonaws.com/desenaz/dufetazusaguv.pdfIn PDF document text
    • http://garulolit.rf.gd/vorikezurisasew.pdfIn PDF document text
    • http://beruleruz.rf.gd/gozatemasomopolefegame.pdfIn PDF document text
    • http://nulesuli.epizy.com/pujuponolarajebaropelo.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_off0001d220.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1D220 5424 bytes
SHA-256: e9c1bdbecd24734d43538639556b5ea4b19b0609d2b0df39d1c18c3f6074a425
font_01_sfnt_off0001e4be.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1E4BE 13724 bytes
SHA-256: ea6aff26066387a3c8a7e85890b4562196363576b022ad0d1226c666e82cd2aa