Malicious PDF — malware analysis report

Static analysis result for SHA-256 e7d2c469072e883f…

MALICIOUS

PDF

87.7 KB Created: 2021-03-24 20:24:17 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-25
MD5: 25f78787aee275d6d5819f747db83053 SHA-1: 750fdf3b92f2f73e6ebb9f3bb73d4e87097035d2 SHA-256: e7d2c469072e883fae6c0df259304c5bbb9475034a1980aedb192ea326efb804
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 0.9997

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://druttle.ru/strik?utm_term=new+moon+book+cover+meaning PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4383147/normal_5fe9ca0d57a2b.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4381752/normal_602eb5ba38f30.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4414679/normal_5feceddc24c83.pdfIn PDF document text
    • http://jodazok.22web.org/free_christmas_carol_sheet_music_for_piano.pdfIn PDF document text
    • http://dolinunuridaku.iblogger.org/the_capitalist_space_economy.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4499942/normal_601f2a231ea57.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://uploads.strikinglycdn.com/files/98d95749-afc8-4513-bc67-a952446047a3/14324396810.pdfIn PDF document text
    • http://tubulufegufixo.rf.gd/gewovowoguritomiziben.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/60069814-caaf-4443-92f7-8afdb3b1f101/greenbaum_sidney_-_the_oxford_english_grammar_very_advanced.pdfIn PDF document text
    • http://xakilapug.epizy.com/32421376233.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/832c2612-838b-46f9-9195-bc21f425f37c/little_red_riding_hood_book_picture.pdfIn PDF document text
    • http://viropamel.rf.gd/sofimakif.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/0b7668ca-4a92-4577-93e0-7b69640d2a8c/rarobalojamizetubi.pdfIn PDF document text
    • http://fuxazulofonu.epizy.com/pimowedawukinulifa.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/e098ab64-20cb-46da-9484-e9eb2ea4c5e4/35657848046.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/c1678217-2c53-4c93-a003-77a4a5af9ac0/60937732311.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/5c420639-8f98-4c0f-9a5a-9928d51c1686/grohe_kitchen_faucet_quick_connector.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/b215da7f-1262-4264-af12-9d59c23a19e0/xedulemoxufarix.pdfIn PDF document text
    • http://biwedidato.rf.gd/agenda_21_italiano.pdfIn PDF document text
    • http://tejogasev.rf.gd/election_commission_of_west_bengal_voter_list_1966_download.pdfIn PDF document text
    • http://sudurima.rf.gd/remington_outlaw_chainsaw_reviews.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_off0001197c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1197C 5232 bytes
SHA-256: 0d24f00fc3766323d32845c36515aa734365ef1647eb9395820f0cebf3ba1110
font_01_sfnt_off00012b5a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12B5A 11276 bytes
SHA-256: fca7272ddb350016042bb851c58dacbf60f700dcdda2415158ea781614746298

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