Malicious PDF — malware analysis report

Static analysis result for SHA-256 a15d4e292304b4ac…

MALICIOUS

PDF

79.8 KB Created: 2021-03-15 21:52:09 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-22
MD5: 4019f979b853822a6c284a45a5c4692f SHA-1: 386a263cf43403775230290734a717129cffb9ad SHA-256: a15d4e292304b4acbd345785047b12a5ded7c897379599a628c0f64df68f318f
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://jottigo.ru/aws?utm_term=what+child+is+this+chords PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4486971/normal_60247e0f10776.pdfIn PDF document text
    • http://kamefutebiwef.mywebcommunity.org/zoom_g5n_effect_list.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4474723/normal_5fed18194662f.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4405662/normal_602b0f0ec9816.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4426547/normal_601d7623c4c06.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4444649/normal_60485e73be6d6.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4476936/normal_5fe1040b2e4ec.pdfIn PDF document text
    • http://lurubalopare.sportsontheweb.net/siduxuma.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4414336/normal_6005e7a1eeb7b.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4473052/normal_60390218d3fb8.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4484635/normal_5fffb277d2c1f.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://bf130ee1-1463-4c69-9604-1b23772ced92.filesusr.com/ugd/b4609a_292515948c4047818dc7f3955e20c4d0.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/bifadiwuwileji/incident_response_template_doc.pdfIn PDF document text
    • https://s3.amazonaws.com/jeromisixinolib/how_to_fix_a_drill_battery_that_wont_charge.pdfIn PDF document text
    • https://84d51d8d-5932-465a-b044-5d36dace581c.filesusr.com/ugd/98e2de_47104f6a409942adb33d07aaeafc249b.pdf?index=trueIn PDF document text
    • https://5c3e38fa-bf2d-4cda-bfdc-19e9a39f2227.filesusr.com/ugd/b3ada4_c9771ec2bbcb43d6ae78a87c77769c34.pdf?index=trueIn PDF document text
    • http://vovakupalujum.onlinewebshop.net/tuwatejezidojozuwexeves.pdfIn PDF document text
    • https://737bf953-b780-43bc-8af0-312ed5328a40.filesusr.com/ugd/017c44_548e4fe058f545fd88e376ad7cc566e7.pdf?index=trueIn PDF document text
    • https://d190c387-1498-4382-a59e-98d1a0a9794c.filesusr.com/ugd/a91264_401c73781f154a96bcb23dca4c2862a4.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/gupawupigawono/tutorial_autocad_2012_3d.pdfIn PDF document text
    • https://s3.amazonaws.com/levumoduf/wniosek_o_zaoenie_dziaalnoci_gospodarczej_ceidg.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

Related samples 5

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000f95f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF95F 5040 bytes
SHA-256: acdb96fad5e7040fe717ef2b20c6cf7becf435c5afd1024c0917c80b73ac71d6
font_01_sfnt_off00010a84.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10A84 12024 bytes
SHA-256: 8fc6d861c5782577d7c6e001f40c8b73bdfb980a16ee361faa298ffc0e511a5a

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