Malicious PDF — malware analysis report

Static analysis result for SHA-256 e7aeeb021f9da435…

MALICIOUS

PDF

128.1 KB Created: 2021-03-23 03:02:53 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-23
MD5: 04d62f0aed24623a28aacc7f775de38f SHA-1: 22d0b9668c9f5fe7b03bb4f7e7d0611207789a8b SHA-256: e7aeeb021f9da4358d8496612d21688c45e1198271d0f29cd608d60405b634f9
186 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF contains a large number of external links, many pointing to disposable domains, indicating a link farm or SEO manipulation tactic. The ML classifier and ClamAV detection strongly suggest malicious intent, likely related to phishing or malware distribution via these links. No scripts were extracted, but the PDF structure itself is indicative of malicious activity.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9974

Heuristics 6

  • 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 contains mass external PDF link farm critical PDF_SEO_LINK_FARM
    Small PDF contains many clickable external PDF links, mostly clustered on one host. This matches generated SEO/link-farm PDF carriers used to route users into malicious or unwanted-software delivery chains, rather than a normal document citation pattern.
  • 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://jumiwimov.ru/award?keyword=apologia+de+socrates+segun+platon+pdf PDF link annotation
    • https://gewaxuselez.weebly.com/uploads/1/3/4/2/134265722/nubajewi_jefomokaribujur.pdfIn PDF document text
    • https://wowutelugige.weebly.com/uploads/1/3/4/3/134359508/bemuk-weged-vapidelazara-sijig.pdfIn PDF document text
    • http://koponegigat.medianewsonline.com/38792154224.pdfIn PDF document text
    • http://gejejasofubi.mywebcommunity.org/diagnostico_organizacional_concepto.pdfIn PDF document text
    • https://zugozoriv.weebly.com/uploads/1/3/4/7/134770463/3879593.pdfIn PDF document text
    • https://wuzikixow.weebly.com/uploads/1/3/0/7/130775075/dawodatozipunu_fakumavozanix.pdfIn PDF document text
    • https://bamufikike.weebly.com/uploads/1/3/1/6/131606241/3f007.pdfIn PDF document text
    • https://girenofozajete.weebly.com/uploads/1/3/4/4/134476001/barebovepu.pdfIn PDF document text
    • https://suxozunepewax.weebly.com/uploads/1/3/2/8/132814427/16818c7f9f4d.pdfIn PDF document text
    • https://nosovaranipad.weebly.com/uploads/1/3/4/7/134743093/mizepovaman.pdfIn PDF document text
    • https://bilezebije.weebly.com/uploads/1/3/4/3/134344171/000506ae.pdfIn PDF document text
    • https://tusanoxoledaz.weebly.com/uploads/1/3/4/7/134741707/mededonujeraj-tumidirobitupog.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/daniwodug/remington_700_bdl_custom_deluxe_engraved_value.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/8dae93ef-6dde-435f-b573-8f6d954f4b87/how_to_program_remote_to_arris_cable_box.pdfIn PDF document text
    • https://s3.amazonaws.com/vibasujefir/xulaxofezopisewonudu.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/61cae931-0d0b-48e1-ac68-9a4622f7b2e9/altered_carbon_season_2_review_guardian.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/841e0a8d-daeb-40b5-9007-ed385550ebc9/the_circular_ruins_analysis_essay.pdfIn PDF document text
    • https://s3.amazonaws.com/jodabiladezot/fofiketebexaxunavol.pdfIn PDF document text
    • https://s3.amazonaws.com/womirofop/76469907476.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/f021eae2-ca11-46d1-bb0c-81655efa575a/85896264317.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/b6b332ee-d6fb-4edc-8e5c-1baa6fe9c84d/7.3_l_oil_pan_dipstick_repair_kit.pdfIn PDF document text
    • https://128fc002-9ed4-4a8f-9a6b-83b43563a9ed.filesusr.com/ugd/6812d7_d6ea7af847ab40e6b1bc91ccccaf6fbd.pdf?index=trueIn PDF document text
    • http://xemigososefof.atwebpages.com/tinkle_double_digest.pdfIn PDF document text
    • https://3b044092-e341-4c69-a8e2-52b14fc1865f.filesusr.com/ugd/370021_c3767a24cc2740bc9b8d8e06ddaad814.pdf?index=trueIn PDF document text
    • https://4db61c00-1078-4917-8a1c-a2c1480eb6e0.filesusr.com/ugd/c94206_d0b11dcbe57a4d34a1a1ae5abdf65d96.pdf?index=trueIn PDF document text
    • https://0298dc5a-7924-4276-8279-06452a5288da.filesusr.com/ugd/b30cf0_b757d605805349b088e96a303e782cda.pdf?index=trueIn PDF document text
    • https://9e1b5e4e-b4ab-405b-8fdf-b3b6d7b19c28.filesusr.com/ugd/94ea38_44d693079a7d46958ac761dcaff5012c.pdf?index=trueIn 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_off0001b6f3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1B6F3 5312 bytes
SHA-256: 0d0d7769c9fc0a43335618a9120c8fa2facc4ed6805e769f08ab39fc434daab0
font_01_sfnt_off0001c915.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1C915 12212 bytes
SHA-256: ef45c400dd22cb48536f3be4a6e405b70f91ea7cf10bae08b71c8537b6c8ec7c

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