Malicious PDF — malware analysis report

Static analysis result for SHA-256 dc1ddc5812e01b5d…

MALICIOUS

PDF

80.3 KB Created: 2021-03-09 17:46:11 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-22
MD5: d0b935de8e655f23ec0cdb9e3da73edd SHA-1: 211893ea987c1407bc4c9d457764091bfd2ef366 SHA-256: dc1ddc5812e01b5d79bdf37603e7b4214631eb6e2f2d7e214ab554075bdbea8f
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 0.9998

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://maypoin.ru/wix?keyword=kingdom+hearts+358%252F2+days+novel+pdf PDF link annotation
    • http://drovazvenigorod.ru/logitech_m325c_mouse_not_working_macqpmvp.pdfIn PDF document text
    • http://vawurabel.mygamesonline.org/89745962098.pdfIn PDF document text
    • http://buliwomof.22web.org/credit_mutuel_nord_europe_annual_report_2018.pdfIn PDF document text
    • http://pogibofabut.getenjoyment.net/wibanifezuzoni.pdfIn PDF document text
    • http://reduslim-italiaufficiale.site/vozaxojikikakadavebrm4bj.pdfIn PDF document text
    • http://katipef.medianewsonline.com/84409952116.pdfIn PDF document text
    • http://rejamar.sportsontheweb.net/cuanto_es_1_32_en_mm.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • https://45dcde1a-aed5-4138-b95e-a0f768a283bf.filesusr.com/ugd/89441e_d92bebe2acd5497598855e82df860343.pdf?index=trueIn PDF document text
    • http://pimurif.rf.gd/rejepaturixaboposixenu.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/aefc1d75-39f9-4fd4-8f44-e60f493b666b/85904258975.pdfIn PDF document text
    • http://vifidumefitur.atwebpages.com/is_potassium_chlorate_a_strong_or_weak_acid.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/7af71fba-c968-4a47-a531-58afdeb4100f/lulobed.pdfIn PDF document text
    • https://354df738-7a8c-4643-bdcd-aa58f7c4bd0c.filesusr.com/ugd/69cf62_428f60ad06ac45aab7d5816f4837ce2a.pdf?index=trueIn PDF document text
    • https://ba428ff1-d53d-4eb5-bdb2-cc960067f420.filesusr.com/ugd/7041e4_5466cb21974d4c08aa184f146e8d3300.pdf?index=trueIn PDF document text
    • http://begupegag.epizy.com/bts_love_yourself_highlight_reel_piano_sheet.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/f0408f12-e694-4e78-b71c-c00bb0f7e5e4/dungeon_and_dragons_online_2020.pdfIn PDF document text
    • http://dezobod.onlinewebshop.net/ruworejifalobaw.pdfIn PDF document text
    • http://netomadutimafe.onlinewebshop.net/34786071009.pdfIn PDF document text
    • http://fufudaloxola.onlinewebshop.net/manafejizalexufugomev.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000ec6f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEC6F 6024 bytes
SHA-256: cb15a6e10b60d00e8b442b84ab08d5f6e82084c38dce865bea4d6f566e5168a8
font_01_sfnt_off000100d0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x100D0 10872 bytes
SHA-256: c2b7ac2be778e7d26c8961c2f8461eb318f932bee527dfc6aaa9a4357d7f65c1
font_02_sfnt_off000125ff.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x125FF 4324 bytes
SHA-256: 0d0f64e27578eb124b8bc81c7eceacdd166e22eddd95c81328e9fbd7de2a6333

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