Malicious PDF — malware analysis report

Static analysis result for SHA-256 d23397d4da722dce…

MALICIOUS

PDF

39.8 KB Created: 2020-03-29 23:39:58 +03:00 Authoring application: wkhtmltopdf 0.12.1.4 (via Qt 4.8.6) First seen: 2020-09-24
MD5: 5e46907dd75940d8c4b3f76da61e10ff SHA-1: 9336c46e0d52f04e7c672fdc95141f517fe93e1f SHA-256: d23397d4da722dce838f4aed23359f9659d2d4c0b17450e08903ec8bf5120f84
96 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 User Execution: Malicious File

The PDF file contains a large number of embedded external URLs, indicating a link farm or distribution mechanism. The heuristic 'PDF_SEO_LINK_FARM' strongly suggests this behavior, pointing to a malicious intent to manipulate search results or redirect users to potentially harmful content. No scripts were extracted, limiting the analysis of direct payload execution.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 4

  • 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.
  • 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 http://hellsescortmc.com/uploads/1/3/0/6/130620585/130620585.html#palabras+con+el+prefijo+penta PDF link annotation
    • http://creativespiritsnewark.org/uploads/1/3/0/9/130969944/6826196.pdfIn PDF document text
    • http://www.deals.pearldistrict.com/uploads/1/3/0/7/130740112/f71e62ab391e4.pdfIn PDF document text
    • http://menstrualmagic.com/uploads/1/3/0/8/130814611/8569369.pdfIn PDF document text
    • http://collaborativefamilyservices.net/uploads/1/3/0/4/130483909/tazejomekedazuz_vevewutukawi_tunivunup.pdfIn PDF document text
    • http://iron-peptides.com/uploads/1/3/0/6/130604433/kedapozelotipi_malowilasolazer.pdfIn PDF document text
    • http://kchengineering.net/uploads/1/3/0/8/130874477/gazokefefesolufo.pdfIn PDF document text
    • http://akysora.com/uploads/1/3/0/6/130620163/nunozo.pdfIn PDF document text
    • http://abilenecares.org/uploads/1/3/0/7/130739628/9285140.pdfIn PDF document text
    • http://scratchiecat.com/uploads/1/3/0/6/130604639/vanagamagerupu_kofutik_parikisupepagov.pdfIn PDF document text
    • http://suzanneensmann.com/uploads/1/3/0/5/130588656/374253.pdfIn PDF document text
    • http://christiansongsforkids.com/uploads/1/3/0/6/130604606/85813.pdfIn PDF document text
    • http://fertilitychallenged.com/uploads/1/3/0/5/130588679/9422734.pdfIn PDF document text
    • http://vriesea.com/uploads/1/3/1/0/131069968/nutaxev_lofiv_gelepopiroge_falevolejofegep.pdfIn PDF document text
    • http://laubenpiepers-finest.com/uploads/1/3/1/4/131409385/8364915.pdfIn PDF document text
    • http://vo2performance.com/uploads/1/3/0/7/130740195/9326945.pdfIn PDF document text
    • http://cjconcep.art/uploads/1/3/0/7/130775584/vubagulorumugoda.pdfIn PDF document text
    • http://kristinarevphotography.com/uploads/1/3/0/7/130776072/jokoweb.pdfIn PDF document text
    • http://thebeardedsailorvt.com/uploads/1/3/0/4/130436068/najesudigutu.pdfIn PDF document text
    • http://belenartleaguegalleryandgifts.com/uploads/1/3/1/3/131398598/zatexuzi_toluf_wutoduj.pdfIn PDF document text
    • http://elizalape.com/uploads/1/3/0/7/130739383/24ab8675b087.pdfIn PDF document text
    • http://perspectivedesign.xyz/uploads/1/3/0/6/130639513/buladexugoxiz.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

Related samples 4

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

Full JSON: related samples API

Extracted artifacts 1

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00007187.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7187 8456 bytes
SHA-256: 43131dc20e1358ea99d925c51c8b1dc4f939ce0a57f77f4555d967c17dabdbf4

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