Malicious PDF — malware analysis report

Static analysis result for SHA-256 f44e2c3129bd1036…

MALICIOUS

PDF

36.9 KB Created: 2020-10-02 05:45:49 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-15
MD5: 7718cc59beef724a56bba91bf2b31178 SHA-1: b9ac0c73db8f74f2d5cc6f05edeca20e2d4502ce SHA-256: f44e2c3129bd103685c7595d24ee0f77483a6024fcee590898f3651baa34986c
132 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 5

  • 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.
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • 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=download+nf+mansion+album+free In PDF document text
    • https://site-1039618.mozfiles.com/files/1039618/80393787110.pdfIn PDF document text
    • https://site-1039259.mozfiles.com/files/1039259/70101819388.pdfIn PDF document text
    • https://site-1037196.mozfiles.com/files/1037196/luvajefem.pdfIn PDF document text
    • https://site-1038334.mozfiles.com/files/1038334/33556733782.pdfIn PDF document text
    • https://site-1036988.mozfiles.com/files/1036988/51886227174.pdfIn PDF document text
    • http://files.infiniteshinecleaning.com/uploads/1/3/1/3/131381607/wolelalidu_sugurizoji_tenuzonira_nipijufupa.pdfIn PDF document text
    • http://files.unitedmediasolutions.info/uploads/1/3/0/8/130814200/ae29caf555f2.pdfIn PDF document text
    • http://sesorof.thetimebetweenis.org/uploads/1/3/1/6/131606490/35dc1fe65.pdfIn PDF document text
    • http://belajeze.caringinc.net/uploads/1/3/1/3/131398252/xefujipisogupun_kasabiv.pdfIn PDF document text
    • https://site-1038988.mozfiles.com/files/1038988/lenepedozaloxigeso.pdfIn PDF document text
    • https://site-1038519.mozfiles.com/files/1038519/34898217544.pdfIn PDF document text
    • https://site-1039305.mozfiles.com/files/1039305/lonanejikelidosazu.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/0743/5167/files/shop_fox_dust_collector_w1727.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/2816/9383/files/auto_turret_rust_recycle.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/7614/8643/files/nenivesur.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_off00005097.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5097 5284 bytes
SHA-256: b118cfbf2352768528acbaf3baf406c662cfcc0c7fcf9b9d572ed9b4fe552d5f
font_01_sfnt_off00006291.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6291 10944 bytes
SHA-256: a3564ff7e5c1f3d73ff651dab7d3857be61828992a79b0aa5ec558cb4e46eeb3