Malicious PDF — malware analysis report

Static analysis result for SHA-256 cfe485d22f88e894…

MALICIOUS

PDF

48.2 KB Created: 2020-10-04 14:52:28 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-19
MD5: 451db6a8448f86e7bde0b2d6de8c1557 SHA-1: 13a048d5cf25adc2ba4e825d489478d392c44882 SHA-256: cfe485d22f88e894beeabfbfc60905458ed3df4ee4a2cb70e79ae9e29320e3e9
192 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 6

  • 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 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.
  • Urgency / deadline lure low SE_URGENCY_LURE
    Document contains urgency or deadline language ('account will be terminated', 'action required within 24 hours', etc.) — useful context, but low-signal without other findings
  • 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://ggtraff.ru/strik?keyword=structural+bolting+handbook+2010 In PDF document text
    • http://files.annettesplacenz.com/uploads/1/3/1/3/131379743/boresenuradimil.pdfIn PDF document text
    • http://files.1divashop.com/uploads/1/3/1/8/131857334/d451c2c90c0208e.pdfIn PDF document text
    • http://files.catninga.com/uploads/1/3/1/6/131607043/1d8912.pdfIn PDF document text
    • http://vezab.stjohnlutherans.org/uploads/1/3/1/4/131413418/pitibu_bamof.pdfIn PDF document text
    • http://wepaxuma.faithymystory.com/uploads/1/3/0/7/130740434/wuzisituboser.pdfIn PDF document text
    • http://files.michellemorrisonwrites.com/uploads/1/3/0/8/130815137/xizevenib.pdfIn PDF document text
    • https://site-1037265.mozfiles.com/files/1037265/wanebusipemenazalet.pdfIn PDF document text
    • https://site-1036932.mozfiles.com/files/1036932/93670543219.pdfIn PDF document text
    • https://site-1040341.mozfiles.com/files/1040341/92685767100.pdfIn PDF document text
    • https://site-1040396.mozfiles.com/files/1040396/xivajatef.pdfIn PDF document text
    • https://site-1041854.mozfiles.com/files/1041854/93518845052.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/d49eda8c-e73a-432c-9bda-3708fc03c5bd/naxiferowiva.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/1e23a119-a9c5-41fd-9aa7-565ee79106b1/53449589746.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/48953a6a-784f-43d1-827a-cdad6cae1064/51805949187.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/eec7a1ae-5536-48ae-a945-60ea7b725656/zisanomupel.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/67b146fc-6a1c-4a8d-bd98-002e2dd28163/91831978803.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

Related samples 8

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00007c95.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7C95 5656 bytes
SHA-256: 29e6f3732ee69acf2e35ca6b611dc3e986b8f2860a27f2a4ef460fb5e67017d6
font_01_sfnt_off00008fcf.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8FCF 10636 bytes
SHA-256: 257e15e3b66614bc4944c350572d569897c76b03e8e5f64a6e28f965c1e49971

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