Malicious PDF — malware analysis report

Static analysis result for SHA-256 c8bcdf40782c37c1…

MALICIOUS

PDF

94.5 KB Created: 2021-03-14 12:30:48 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-23
MD5: 36f523174a11f2bc2922f17888ca48b8 SHA-1: 940999a98d94ed2ae5a4c7b0cb758d0c5cf090fb SHA-256: c8bcdf40782c37c1513acf3c6acb3f87b96e55f83b824bfd44603a8512905cb1
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 0.9990

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://kuzutuzo.ru/award?keyword=devi+bhagavatam+sanskrit+pdf PDF link annotation
    • https://desagudag.weebly.com/uploads/1/3/4/6/134676200/lifunatexa.pdfIn PDF document text
    • https://cdn.sqhk.co/sowojusawepu/Ygcdegc/how_to_check_software_update_on_lg_tv.pdfIn PDF document text
    • https://cdn.sqhk.co/tiwumixe/bhiF2ji/gologuxuwejopimorexot.pdfIn PDF document text
    • http://dijawobal.iblogger.org/dd_3.5_players_handbook_amazon.pdfIn PDF document text
    • https://pixasowurixes.weebly.com/uploads/1/3/4/9/134904492/ac211e2b.pdfIn PDF document text
    • https://cdn.sqhk.co/rojawamusula/fhbijgd/the_last_stand_update_release_date.pdfIn PDF document text
    • http://nowefatot.22web.org/what_are_the_components_of_chlorophyll.pdfIn PDF document text
    • https://pudukodup.weebly.com/uploads/1/3/1/4/131407572/a7d3d5e4548.pdfIn PDF document text
    • https://cdn.sqhk.co/rolileduvof/ufeCsjg/hallmark_channel_when_calls_the_heart_season_6.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://fedorahosted.org/lohitIn PDF document text
    • https://uploads.strikinglycdn.com/files/f2877399-4244-444f-8cb8-1bf77be38415/fuguxoris.pdfIn PDF document text
    • https://s3.amazonaws.com/buponuwebi/scribblenauts_ds_guide.pdfIn PDF document text
    • http://gupevaworekupa.rf.gd/kelas.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/9dfefb78-25e7-4475-bc5f-e26b6c27e4b0/asus_p5n-e_sli_motherboard_drivers.pdfIn PDF document text
    • https://s3.amazonaws.com/moduluzuxikari/bugosawebebewe.pdfIn PDF document text
    • http://vezexosewomex.epizy.com/data_warehousing_concepts_tutorial.pdfIn PDF document text
    • https://s3.amazonaws.com/wazorixekunafob/mp4_juicess._cc.pdfIn PDF document text
    • https://s3.amazonaws.com/naxizugenabi/67907862931.pdfIn PDF document text
    • http://tokiwubamiwi.rf.gd/hyperdimension_neptunia_mk2_conquest_ending_guide.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/254c007a-e705-425c-ad3a-3527d90575e7/sample_introduction_paragraph_for_persuasive_essay.pdfIn PDF document text
    • http://bipunasozusi.epizy.com/playstation_vita_emulator_apk.pdfIn PDF document text
    • https://s3.amazonaws.com/purufiz/bhakta_tukaram_audio_songs_ing.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/c9afa8b3-cec6-4492-924b-959e2ccdba1c/jewuturemij.pdfIn PDF document text
    • http://nijetazum.epizy.com/kikaropefamelivuxu.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_off00011c81.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11C81 5688 bytes
SHA-256: 4249df00ca5780047360eda9b112c2b1d1cb73db143d5b7660f5e81350dde61f
font_01_sfnt_off00012fbb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12FBB 11916 bytes
SHA-256: ee5af419919a85d9a5994291bf31f3f0422f3f8e521dcd6afef4dcce4a312c11
font_02_sfnt_off0001568a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1568A 5636 bytes
SHA-256: 80a4b5e6c1076d0b21b4c6c8e7408dae355b2129d98cb88c98a9ba1a2000fb37

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