Malicious PDF — malware analysis report

Static analysis result for SHA-256 4f66c38be0a60169…

MALICIOUS

PDF

73.8 KB Created: 2021-03-14 21:10:32 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-23
MD5: 0f346c01038d88ccc531f8b36eafdb71 SHA-1: 5e8193f723655ba5188bd250912294a5abe66d08 SHA-256: 4f66c38be0a60169d6c0a66db5129b62b0eeab9bea797856be677fe524854df5
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 0.9993

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://resalured.ru/wix?keyword=summertime+saga+moon+puzzle PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4485309/normal_601b4b83899af.pdfIn PDF document text
    • https://fabuduviwanor.weebly.com/uploads/1/3/4/7/134739750/1362178.pdfIn PDF document text
    • http://xesapuwax.mywebcommunity.org/42582564884.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4502511/normal_602369285abfb.pdfIn PDF document text
    • https://cdn.sqhk.co/namulofilox/Qsgcpib/2451858488.pdfIn PDF document text
    • https://pinosapop.weebly.com/uploads/1/3/4/1/134131344/be73846f.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4478961/normal_5fd795488be5d.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4476427/normal_600382a123cea.pdfIn PDF document text
    • https://cdn.sqhk.co/pujixefan/Qmjjhdg/server_jobs_orlando.pdfIn PDF document text
    • http://vizilirudigub.getenjoyment.net/who_is_the_gimp_in_ahs_apocalypse.pdfIn PDF document text
    • https://rimibike.weebly.com/uploads/1/3/4/6/134636102/kejemures.pdfIn PDF document text
    • https://pixokunotozonux.weebly.com/uploads/1/3/4/0/134017876/salifosinetima.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4421767/normal_6006ab0a8374d.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4406775/normal_5feb1340116f6.pdfIn PDF document text
    • http://xunarepozufuz.mygamesonline.org/murujasakodumuxozo.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4477367/normal_5ffc6d7e16c1e.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4371553/normal_604cdd2a8d63f.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4453732/normal_600c221964c6f.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4457279/normal_5feed7e17c9cb.pdfIn PDF document text
    • https://cdn.sqhk.co/wobivada/JdPhdKJ/maze_runner_2018_full_movie_download.pdfIn PDF document text
    • https://cdn.sqhk.co/vobevufubito/ZNgfijV/ludeko.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://tijuvewoduga.onlinewebshop.net/14647942170.pdfIn PDF document text
    • http://kafotafuvodalix.onlinewebshop.net/libro_el_cerebro_de_buda.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_off0000e58a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE58A 5292 bytes
SHA-256: 5291cd1b0641cab592e400259065d035ff5e6af11f0ece6a8859f3d15a46561e
font_01_sfnt_off0000f778.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF778 10068 bytes
SHA-256: a507d52729db5d1d926e859556dbe491c353f352d6d80de6b89e9f33d3e19be1

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