Malicious PDF — malware analysis report

Static analysis result for SHA-256 ae280d593f264520…

MALICIOUS

PDF

69.0 KB Created: 2021-03-24 21:32:07 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-23
MD5: d43a272eed60b368da2e11e126b5213f SHA-1: 584426bc649ade4258a41470b1c978c733b789b9 SHA-256: ae280d593f2645203874faaa978ab2180805bc33f3bdfb6a28e0d46fcbb9ac0f
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 0.9996

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://xajibur.ru/wix?keyword=ellipse+worksheet+with+answers+pdf PDF link annotation
    • http://nuzarekuzugav.mypressonline.com/aptt_adalah.pdfIn PDF document text
    • http://sevelorovuwo.66ghz.com/jedugadumu.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4528260/normal_603a203add4dd.pdfIn PDF document text
    • http://mebovedu.getenjoyment.net/42451944411.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4465390/normal_60584287f2b45.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4443602/normal_600a8fe36b113.pdfIn PDF document text
    • http://saripituxupagek.sportsontheweb.net/nuniliwugixivewaze.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/jolozidabi/brainerd_lakes_realty_hotsheet.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/61719670-eec2-422a-892d-69ecf9cead90/art_of_seeing_photography_adventures.pdfIn PDF document text
    • http://wupomadupu.epizy.com/60931842200.pdfIn PDF document text
    • http://supapimegem.rf.gd/zaselofavenapojoke.pdfIn PDF document text
    • http://molagegivijoxu.onlinewebshop.net/posesawororojinulag.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/3666d591-b5b8-42e1-b7d2-b8103f03ea1a/what_does_filial_piety.pdfIn PDF document text
    • http://mewudupite.epizy.com/coloring_sheets_halloween_free.pdfIn PDF document text
    • https://128fc002-9ed4-4a8f-9a6b-83b43563a9ed.filesusr.com/ugd/6812d7_bfc6f5aac3214450ac23bf9067db552d.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/rirusozo/biblical_hebrew_pronunciation_guide.pdfIn PDF document text
    • https://s3.amazonaws.com/voropa/wire_gauge_size_chart.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/cc00c8af-70c9-4e83-a6df-21d1ce9304b6/where_is_the_sim_card_located_on_an_lg_flip_phone.pdfIn PDF document text
    • http://muzizax.rf.gd/oxigeno_definicion.pdfIn PDF document text
    • https://2a009ac4-5770-49f2-ae16-4ce107243443.filesusr.com/ugd/59deca_a32bc5c03b654376ad7e3293266ec46d.pdf?index=trueIn PDF document text
    • https://94ac7338-8c66-48ed-b7e4-01cccba3eff0.filesusr.com/ugd/9b8421_d5b522df8778417eb3a9976809a4b7e7.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_off0000d187.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD187 5244 bytes
SHA-256: 514d65d583de56b550f4e3fadb7df72522e9d2bef2f4c420c3fc35da68ed42a8
font_01_sfnt_off0000e369.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE369 10184 bytes
SHA-256: bf8ed8dae18e983be34c41c200d294030fec595a99c5c8a7d8dad9b12ba8c7de

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