Malicious PDF — malware analysis report

Static analysis result for SHA-256 ae97bb8c8c12bd0d…

MALICIOUS

PDF

83.8 KB Created: 2021-03-22 19:09:35 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-22
MD5: 5c57b3b669f7957c4a5573ff57ac3104 SHA-1: 935100616ebeb311815c0b47c4fdd576196546da SHA-256: ae97bb8c8c12bd0db8dc5206d635fb7000d2a05e0592590bc0b2ad5cf874c312
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://zajinet.ru/aws?utm_term=lexus+nx300+review+canada PDF link annotation
    • https://static.s123-cdn-static.com/uploads/4491665/normal_5fc732f69bc3c.pdfIn PDF document text
    • http://uggi-ugg.com/how_to_delete_programs_on_aqualink_rs44go8d.pdfIn PDF document text
    • http://jifarobajis.sportsontheweb.net/how_to_figure_out_ratios_6th_grade_math.pdfIn PDF document text
    • http://hotita.space/makexat44hhx.pdfIn PDF document text
    • http://moscowflowers.shop/babikonuv9wk0x.pdfIn PDF document text
    • http://zusazibob.iblogger.org/what_were_the_czars_of_russia.pdfIn PDF document text
    • http://famozosivupiwij.sportsontheweb.net/how_to_operate_ryobi_miter_saw.pdfIn PDF document text
    • http://fibisazorowax.mypressonline.com/enciclopedia_de_las_aperturas_de_ajedrez.pdfIn PDF document text
    • http://nuxefigemotak.22web.org/89339429125.pdfIn PDF document text
    • http://mopejon.iblogger.org/asset_management_services.pdfIn PDF document text
    • http://bibuzikufaje.mygamesonline.org/intel_display_audio_driver_windows_7_64_bit_dell.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4421329/normal_605149d0ae9f5.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4365653/normal_5fca83e7d1025.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://dcc20dec-0195-4543-b617-cfb82efd15f0.filesusr.com/ugd/30ea26_94994f44ca7f4a2ab05dc58ecdb46dd6.pdf?index=trueIn PDF document text
    • https://8c4778c4-ed17-4cf1-86f9-5448e21c5c15.filesusr.com/ugd/6da380_fad6669371734dc88e43d219bddbc122.pdf?index=trueIn PDF document text
    • https://a3de454e-1598-42bb-a259-4eb69c42f179.filesusr.com/ugd/fb5067_c85666b368624bf5a591d9c2a803bf35.pdf?index=trueIn PDF document text
    • http://vibiwarufade.rf.gd/miso_pin_full_form.pdfIn PDF document text
    • https://97a45c9e-1ab5-462a-bfe2-fded34b9a8b9.filesusr.com/ugd/b50c55_89814f6769e14c3ebd3a81600476317e.pdf?index=trueIn PDF document text
    • http://xozodede.rf.gd/captain_underpants_and_the_sensational_saga_of_sir_stinks-a-lot_summary.pdfIn PDF document text
    • http://balanuvanatitan.epizy.com/vesitikoja.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 8

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_off000106a5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x106A5 5368 bytes
SHA-256: 58af1cc3eee3eec992f3cb5d5968543abea395789eda7e1535dbd4e7d12dc936
font_01_sfnt_off0001190d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1190D 11424 bytes
SHA-256: 81ea450820ac3dd98dacbf8ad966889dab7c80903a1451ff59e862ceddaacc4e

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