Malicious PDF — malware analysis report

Static analysis result for SHA-256 d2f572d9a579f738…

MALICIOUS

PDF

83.3 KB Created: 2021-03-22 09:54:18 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-22
MD5: 9caee9b340028ea476faba165af609a0 SHA-1: c2da66399cd6cd7426dddf91ecb6e7c04bdd4dc0 SHA-256: d2f572d9a579f7389ce5014daa4e1d3b4b530ff0f337ad308fa0b2f01d7395ae
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 0.9995

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
  • 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://leonvi.ru/strik?utm_term=free+printable+world+map+a4+size+black+and+white PDF link annotation
    • https://cdn.sqhk.co/pelopuxi/idX4Whg/foldersync_alternative_app.pdfIn PDF document text
    • https://cdn.sqhk.co/zatejurix/ie1Sja4/cosmoprof_near_me_open.pdfIn PDF document text
    • https://cdn.sqhk.co/pememobuwir/ihhJjh2/minimum_and_maximum_cardinality_examples.pdfIn PDF document text
    • http://xinupavob.iblogger.org/saxifatikafo.pdfIn PDF document text
    • http://sozefavi.22web.org/superannuation_form_employer.pdfIn PDF document text
    • http://xodulik.66ghz.com/76661348560.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • http://daxevetefixidaj.epizy.com/nojuxunuwuweja.pdfIn PDF document text
    • https://8ed7b8cb-9bae-4def-ad9b-66b28cd11f91.filesusr.com/ugd/740d8c_08bd8edc9e914edaa764cc627f903a43.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/sosupejuxofedo/john_deere_185_hydro_owners_manual.pdfIn PDF document text
    • http://koxaxinum.epizy.com/basic_instinct_3_dual_audio_300mb.pdfIn PDF document text
    • https://s3.amazonaws.com/xupimaral/bhajan_dj_song_video_hd_2019.pdfIn PDF document text
    • http://vezuzatutuxi.epizy.com/can_you_return_a_parcel_to_sender_for_free.pdfIn PDF document text
    • http://tixodafur.epizy.com/sifusej.pdfIn PDF document text
    • https://bb491b24-4c81-4ccc-8daa-bf1baeb171c2.filesusr.com/ugd/93c935_3e138679aae543f9a3d315a991dff503.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/zonivezada/wazola.pdfIn PDF document text
    • https://dedb376b-efc3-4528-ac10-fc65d12f866c.filesusr.com/ugd/5f6074_071de1d7cd5e486d8eda00bba7c5dee5.pdf?index=trueIn PDF document text
    • http://tujugub.rf.gd/kierkegaard_either_or_part_1.pdfIn PDF document text
    • http://vejebuta.rf.gd/femakigotisemukilofoz.pdfIn PDF document text
    • http://vizawog.epizy.com/45437768920.pdfIn PDF document text
    • https://dc6b22d1-fd3c-476a-b8f1-b0505981f591.filesusr.com/ugd/ab5adf_442000f7e8944088ad4d3863512ff1b5.pdf?index=trueIn PDF document text
    • https://96ea5dd8-6962-4d57-b29c-fb233a715e3b.filesusr.com/ugd/ac3463_75dd7d8041904c19bfa68c5d8da800db.pdf?index=trueIn PDF document text
    • http://rufuxikokuka.rf.gd/descargar_cutting_edge_elementary_third_edition.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000fa2e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFA2E 5492 bytes
SHA-256: d6206bcedc0d8d0f926f684d62a5636f3e5040426a29486ed073eae0f3d25e3f
font_01_sfnt_off00010cb7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10CB7 10620 bytes
SHA-256: 44e4323e5e4bafa75edb92ec7cfccd2911b8ea3cad96e33792ba9a5ab953e37f
font_02_sfnt_off00013104.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13104 4324 bytes
SHA-256: 1062cd8ddf90f4344fa193b395386d5669df1a952e5759311ca261a71931f361

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