Malicious PDF — malware analysis report

Static analysis result for SHA-256 b65c9d7f594fd361…

MALICIOUS

PDF

82.2 KB Created: 2021-04-07 23:42:35 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-24
MD5: 21d793cc0143ac1b6ad00f8c77ff1772 SHA-1: 585786945a118528f06e4e0fabff01042a1f33b6 SHA-256: b65c9d7f594fd36186fb8e7864e82638975801b7dd1358dd0398f0040c595b82
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 0.9992

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://seumenha.ru/strik?utm_term=baby+girl+names+from+the+bible+in+spanish PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4481847/normal_5fd97b997cbe6.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4370074/normal_603b66a43f9a6.pdfIn PDF document text
    • https://jadikabejoza.weebly.com/uploads/1/3/2/7/132740193/zutubegi-givemiwi-vetup.pdfIn PDF document text
    • https://ruputosara.weebly.com/uploads/1/3/4/4/134456906/ziruwunoso_kudugudixobu.pdfIn PDF document text
    • https://cdn.sqhk.co/moxoxitij/ghZgd5M/crazy_kickball_variations.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4493905/normal_602ea0030c531.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4476429/normal_6002ae4a29127.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4468553/normal_601bc31f946e5.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4449973/normal_5fcfaeaf839ab.pdfIn PDF document text
    • http://ludozikime.22web.org/kajenimenanuwovexezizerew.pdfIn PDF document text
    • https://rizomoxus.weebly.com/uploads/1/3/4/5/134589692/potevir.pdfIn PDF document text
    • https://cdn.sqhk.co/riragimi/cp25lgg/25765230347.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4379968/normal_5fe4f313a8a6d.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4414486/normal_5ff65eb26503b.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4468268/normal_5fddfdd930d04.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://sinalowus.epizy.com/drug_test_results_template.pdfIn PDF document text
    • http://fafaxuz.epizy.com/mere_apologetics.pdfIn PDF document text
    • http://dikazimizoban.epizy.com/the_redemption_of_time_synopsis.pdfIn PDF document text
    • http://zupibejozoge.rf.gd/how_to_change_charter_remote.pdfIn PDF document text
    • http://bilixovat.rf.gd/how_to_get_rid_of_back_fat_gym.pdfIn PDF document text
    • http://migegavirunafo.rf.gd/roles_and_authorizations_in_sap.pdfIn PDF document text
    • http://wigeriwo.rf.gd/bangladesh_passport_renewal_form_paris.pdfIn PDF document text
    • http://vuminezal.rf.gd/41950323203.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_off00010038.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10038 5604 bytes
SHA-256: 7b7f9b2176dcb7de7db1b503dd85639b2ad060b4f3c33ad9af6fa2a2b99cda6d
font_01_sfnt_off0001132a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1132A 12696 bytes
SHA-256: 80ac4b6c13ffb3ff55979f2c4e037dda7ecff0473c2b8e20802af42646bcf594

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