Malicious PDF — malware analysis report

Static analysis result for SHA-256 9123b558f3f371cb…

MALICIOUS

PDF

73.0 KB Created: 2021-03-07 14:52:20 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-23
MD5: 8a7e18554aa93308b20f182be7a5e9d6 SHA-1: a41f1d356d9ee3d4f6e156709e46487cc60cbac9 SHA-256: 9123b558f3f371cb36278ddf4066a2b675899b0f2043da338f82dc53fa6aae6b
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://ponafet.ru/wix?keyword=fastest+horse+botw PDF link annotation
    • http://towufato.mywebcommunity.org/how_to_clean_swiffer_wet_jet.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4413842/normal_5fc56b7feca21.pdfIn PDF document text
    • http://kevebofuru.medianewsonline.com/nelejedudobogubawijabewe.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4460232/normal_601b1a9b7c328.pdfIn PDF document text
    • http://santand-es.com/mens_medium_hairstyles_for_thick_wavy_hairojx4z.pdfIn PDF document text
    • http://siwivelijutore.medianewsonline.com/how_many_calories_in_a_black_bean_quesarito.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4486984/normal_6019a2b0ae54f.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4484631/normal_6040491e5575b.pdfIn PDF document text
    • http://lebizifijafaxim.medianewsonline.com/apple_a1392_setup.pdfIn PDF document text
    • http://antonio-ita.space/duremajazowopapinii8.pdfIn PDF document text
    • http://helplnstagramcontact6088758.com/vastu_shastra_in_englishi2tbs.pdfIn PDF document text
    • http://jibakerutev.mypressonline.com/penokuxukinezatesiguwozat.pdfIn PDF document text
    • http://golosa-spasibo.ru/different_kung_fu_fighting_stylesrcpzs.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/b5116b17-49a5-4fed-b99a-5080b23c8bac/dejakitotil.pdfIn PDF document text
    • https://s3.amazonaws.com/rudelazifizuvo/8143500598.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/9c632396-b05a-4a87-a916-c1ce138be17a/races_of_faerun_pack.pdfIn PDF document text
    • https://s3.amazonaws.com/bidemewufa/28734357919.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/08e60218-5df9-47af-9fdf-c14dc9007175/niger.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/54a840ea-8c54-4f05-a154-dbdef8fb3e23/gowolujixinogo.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/add8bfaf-dc0f-43a9-8ddd-e2d7cb3afc0d/76722506253.pdfIn PDF document text
    • http://gegurobaz.myartsonline.com/83704477979.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_off0000e190.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE190 4928 bytes
SHA-256: e5da3d03502f76d7b847d14536d4fb094ec0f2527255638ceddb3c6a8a8310ab
font_01_sfnt_off0000f260.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF260 10880 bytes
SHA-256: a6ff6413cc93d002c10debeccb3731aac6e8f507166a722ec10e401edea2f822

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