Malicious PDF — malware analysis report

Static analysis result for SHA-256 ae59b5248999f00d…

MALICIOUS

PDF

76.3 KB Created: 2021-03-22 21:07:25 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-24
MD5: 3088e8068a2adca52777bbbaf0242f5c SHA-1: 50d705cd433f07e8b229f1d384c2c6898c771e9a SHA-256: ae59b5248999f00dd44b808aee7d77a5e2dcdb94d0e40051f16b57f91af41371
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 0.9991

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://gimoguvi.ru/wix?keyword=french+er+verbs+worksheet+free PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4499942/normal_60462cc41f82c.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4485442/normal_5fc7d4037be87.pdfIn PDF document text
    • https://sixagezox.weebly.com/uploads/1/3/1/6/131606695/lojileluv.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4379046/normal_601e6708c5a8d.pdfIn PDF document text
    • http://gifazat.iblogger.org/mapa_de_carreteras_de_portugal.pdfIn PDF document text
    • https://telavepifamika.weebly.com/uploads/1/3/4/3/134352802/zujupezizatajox_wovinod_renodevadetat.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4408707/normal_6011b780f108e.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4376086/normal_5ff5421c78b44.pdfIn PDF document text
    • https://bewimowijukoja.weebly.com/uploads/1/3/4/5/134584545/sazujuvobapigirujebi.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4492897/normal_5fe137b52aefb.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4411001/normal_602832e7514cf.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/zuvovoxigumuz/xexapomeluxivazoxonut.pdfIn PDF document text
    • https://80820154-e864-4b0c-832b-212b24169927.filesusr.com/ugd/c12414_81eeffa4ef6a4ada94b18f2316e7bff1.pdf?index=trueIn PDF document text
    • http://maviwapas.epizy.com/apk_soundabout_pro_secara_gratis.pdfIn PDF document text
    • https://7c8f45b7-e058-4e27-bccd-8ee7dcb26900.filesusr.com/ugd/d5cf39_e3f8d5b15c6b4da7ad4b8f32d29f575b.pdf?index=trueIn PDF document text
    • http://zajoneforisomi.rf.gd/how_to_change_legend_title.pdfIn PDF document text
    • https://s3.amazonaws.com/gebukil/37727353227.pdfIn PDF document text
    • https://104e0e48-a4c2-4a03-8647-06ef64d4e6ac.filesusr.com/ugd/e2c6c1_e511d972c4204973a72481a0d16ddd61.pdf?index=trueIn PDF document text
    • http://keputeka.epizy.com/clear_acrylic_sheet_bunnings.pdfIn PDF document text
    • http://fojufofe.rf.gd/pesetixefofivid.pdfIn PDF document text
    • https://247e77cc-5367-4382-8586-7c5891409f42.filesusr.com/ugd/2dbf5a_bb80c50a7f7541b4a03e91c220976fda.pdf?index=trueIn PDF document text
    • https://9526c93a-d340-4dca-b5fd-2864ff0888c4.filesusr.com/ugd/4c3d6a_b13ee81beded4de5bcdfbd0247a8cfce.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/rumezo/xivixakifowu.pdfIn PDF document text
    • https://s3.amazonaws.com/nilafafakem/lcat24_spec_sheet.pdfIn PDF document text
    • https://s3.amazonaws.com/tawosutosuxi/apple_app_store_android_apk.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_off0000ebd0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEBD0 5036 bytes
SHA-256: 10e55d8b13198c4428e802ece0b7a92f9b04f5e5e643763795d5a8b5f50c1467
font_01_sfnt_off0000fd0e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFD0E 11732 bytes
SHA-256: 48f3e08a16cb2b167ec9a8eaa2cb8e599d9995cdd602d30d04432f80f1eaf70d

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