Malicious PDF — malware analysis report

Static analysis result for SHA-256 afff7badb1d0c199…

MALICIOUS

PDF

65.3 KB Created: 2021-03-01 13:49:10 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-15
MD5: 4b4d67ea21d7355c98e23a39d22f54ae SHA-1: 8ea6043bb2e255f09722b235e484f44191dc5fdc SHA-256: afff7badb1d0c1998c5aa4bd2621d354473118e03c87d1c4516a6bf988be866b
184 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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
  • PDF links to known malicious redirector infrastructure critical PDF_MALICIOUS_REDIRECTOR_LINK
    PDF contains a clickable URI to redirector infrastructure used by a known malicious PDF SEO/adware delivery campaign. These documents typically rely on user interaction and redirect chains rather than a PDF parser vulnerability.
  • 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.
  • 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://dafemum.ru/wix?keyword=schlage+fe595+programming+guide In PDF document text
    • http://philonio.online/vametavipeytnsw.pdfIn PDF document text
    • https://cdn.sqhk.co/xuzalolotagi/B2gfT1H/57858792120.pdfIn PDF document text
    • https://cdn.sqhk.co/leloxoreje/Pidllgh/ti_84_plus_calculator_app_free.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4389384/normal_6034c2b055e36.pdfIn PDF document text
    • http://gopidap.scienceontheweb.net/30231130645.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4426424/normal_5fdeb29d6568c.pdfIn PDF document text
    • https://cdn.sqhk.co/zejejofe/ubjhhc2/tagipujugujav.pdfIn PDF document text
    • http://mebelrostov.ru/the_leaving_book_ending_explained48wxx.pdfIn PDF document text
    • http://carishr.com/83548647952k91xb.pdfIn PDF document text
    • http://wubowobipevoto.mywebcommunity.org/the_happiness_equation_vk.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://balukop.rf.gd/xexibupiwok.pdfIn PDF document text
    • http://gowatane.rf.gd/nutrition_guidelines_for_liver_failure.pdfIn PDF document text
    • http://solukirakologi.epizy.com/themes_app_for_pc.pdfIn PDF document text
    • http://jegigas.epizy.com/decreto_de_guerra_a_muerte.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_off0000c228.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC228 5776 bytes
SHA-256: be3ea38812824986770adce2790be9c0712fb2766d38c52c05f04a11fa8dcc81
font_01_sfnt_off0000d5b2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD5B2 10184 bytes
SHA-256: 2d1372bf9354f51061cc9581ef900f544d8e8e9d5d0a481a05c3999de54ced01