Malicious PDF — malware analysis report

Static analysis result for SHA-256 b70b3ccc5e8ae7ee…

MALICIOUS

PDF

76.0 KB Created: 2021-03-25 07:02:19 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-24
MD5: 47a08d1fc6b266c9d715af2b71d6efab SHA-1: 2f1c8801957488fc32d7f53c757b4d7dd1a8bf84 SHA-256: b70b3ccc5e8ae7ee9fdd682b0c794892a390ee00882a67c40be6879848da5529
186 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

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 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://lozipotod.ru/123?utm_term=adobe+reader+12++free PDF link annotation
    • https://fexaxotira.weebly.com/uploads/1/3/5/4/135401388/judotajip-javusagiwogumol-zijowizo-lumepeti.pdfIn PDF document text
    • http://xawamiwupajev.mygamesonline.org/cracking_codes_with_python_book.pdfIn PDF document text
    • https://rifubagozoj.weebly.com/uploads/1/3/2/6/132695416/6918751.pdfIn PDF document text
    • http://kogemotuju.getenjoyment.net/what_are_some_similes_in_a_sound_of_thunder.pdfIn PDF document text
    • http://nulatapukedu.scienceontheweb.net/xizewet.pdfIn PDF document text
    • http://fejiximodanu.mygamesonline.org/spatial_orientation_reasoning.pdfIn PDF document text
    • https://vinazawodix.weebly.com/uploads/1/3/4/3/134352366/difuwu-widog-lamepolamagaj.pdfIn PDF document text
    • https://pegugigatusib.weebly.com/uploads/1/3/4/4/134460290/84122eae2a9.pdfIn PDF document text
    • https://legadukevow.weebly.com/uploads/1/3/4/3/134313565/lesigimap_govexogu.pdfIn PDF document text
    • http://sutiboju.sportsontheweb.net/precio_instalacion_caldera_gas_natural.pdfIn PDF document text
    • http://wojesukuzak.mygamesonline.org/fagetaworazosuj.pdfIn PDF document text
    • http://tefuvawilutir.mypressonline.com/transport_business_proposal.pdfIn PDF document text
    • https://xekuruwagimutuz.weebly.com/uploads/1/3/2/6/132696141/2484e57a9d68.pdfIn PDF document text
    • https://kotidureguk.weebly.com/uploads/1/3/0/7/130776457/vovek.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://uploads.strikinglycdn.com/files/d3cb43a4-25ec-4896-8d9a-8cf7798222ff/89398747966.pdfIn PDF document text
    • http://zeroxezubanalil.onlinewebshop.net/repimodilavibexep.pdfIn PDF document text
    • https://s3.amazonaws.com/setikizo/24820762227.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/ab80973d-4cdd-4747-a373-db41190db3ad/31192123710.pdfIn PDF document text
    • https://s3.amazonaws.com/sikuva/feasibility_report_meaning_in_english.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/9b4b7b02-2db7-455e-aa0e-5a479da8730f/nozosebexumedoka.pdfIn PDF document text
    • https://s3.amazonaws.com/fasudikek/79790116011.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_off0000ed9f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xED9F 5004 bytes
SHA-256: 08da3647f099a1605a04a882d47ad3f457c23081712e2624a0f30097c57b7a12
font_01_sfnt_off0000feb8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFEB8 10536 bytes
SHA-256: 80d7c43a70148b32246b7b0aadf9e1ac86532ae71e2079c2f2f8ea82a23bf22d

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