Malicious PDF — malware analysis report

Static analysis result for SHA-256 30161bbe475d3b33…

MALICIOUS

PDF

99.9 KB Created: 2021-03-15 20:36:38 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-22
MD5: 30f201268069e5f6e2ceda00b7fd4e0f SHA-1: 9f3a39d3ea74de63af16994667ff0512d41d9918 SHA-256: 30161bbe475d3b3325f4b0e294f2ef66e56614a5284282bd8944bc9e5dd7bc8a
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 0.9997

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://kuzutuzo.ru/aws?utm_term=mismeasure+of+man+chapter+6+summary PDF link annotation
    • https://fifurinirolegif.weebly.com/uploads/1/3/5/3/135306558/najamekefu.pdfIn PDF document text
    • https://lamalirigade.weebly.com/uploads/1/3/4/5/134595912/1757895.pdfIn PDF document text
    • http://gejudoxe.mypressonline.com/labibexolabapukuwazipom.pdfIn PDF document text
    • http://meine-gebuhrenfrei.com/commercial_ice_cream_machine_reviewsgbfnc.pdfIn PDF document text
    • http://rodsfish.club/5_interesting_facts_about_marseille_francekb28w.pdfIn PDF document text
    • http://xikisavi.scienceontheweb.net/97732282608.pdfIn PDF document text
    • https://majizozu.weebly.com/uploads/1/3/4/5/134598595/092c49.pdfIn PDF document text
    • http://fdvsefwfrw.space/human_skeleton_worksheet_for_grade_6z4luk.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4385207/normal_5fde847d7d081.pdfIn PDF document text
    • http://lasns.fun/24128091881fu88a.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4415930/normal_603b7daeb5b9e.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4494677/normal_6016b46db8352.pdfIn PDF document text
    • https://bisebisa.weebly.com/uploads/1/3/1/4/131406118/ac87b2f8.pdfIn PDF document text
    • http://melidagerukebel.sportsontheweb.net/junoxesagegupepo.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://97a45c9e-1ab5-462a-bfe2-fded34b9a8b9.filesusr.com/ugd/b50c55_b4fa2feb62bb4073815213ec4b9113ba.pdf?index=trueIn PDF document text
    • https://7fe1f042-206b-4735-a408-f56337efeeb4.filesusr.com/ugd/d34b51_4b51f98ac1d446859337cff878ecaaa9.pdf?index=trueIn PDF document text
    • http://kikanelomer.onlinewebshop.net/kugebo.pdfIn PDF document text
    • http://peledopa.myartsonline.com/how_to_make_a_paper_origami_ninja_star_step_by_step.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/24940cc2-eefd-44da-af29-f5f019eb38fa/the_better_business_bureau.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/a566adf1-4aed-4a49-8aa7-6e07729249a3/latukewujaniramefovoni.pdfIn PDF document text
    • https://801a9f91-e12c-4b3a-b535-42c3eaff61c8.filesusr.com/ugd/d237ef_dff005c61a9142849e71b94b3944382f.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_off00014a9b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x14A9B 5484 bytes
SHA-256: 33d4aba4fb3996e0f4326f9b72b9252e488410d47975ab7c296377728048ff91
font_01_sfnt_off00015d2d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x15D2D 10976 bytes
SHA-256: cb8dca1e50111d339461a61af6374090cf45609cb2850ccfb67c5440c13242bc

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