Malicious PDF — malware analysis report

Static analysis result for SHA-256 15dd56efe9d5e76e…

MALICIOUS

PDF

85.7 KB Created: 2021-04-27 03:39:54 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-23
MD5: 58810a72351d6cf8b98e19ed0fbf88a3 SHA-1: ea68b822f8112229954ba6270988c9ff5b8c5f02 SHA-256: 15dd56efe9d5e76e8f23cf31c7c2175fbf071ae2cd2409d646503e32580e8b8c
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 0.9991

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://dafemum.ru/strik?utm_term=how+to+get+rid+of+back+fat+with+weights PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4402501/normal_60470ef1b3d9d.pdfIn PDF document text
    • https://komijeji.weebly.com/uploads/1/3/1/6/131606126/zalol.pdfIn PDF document text
    • http://ita-bio.fun/lopi_wood_burning_insert_pricesata6m.pdfIn PDF document text
    • http://pressit.space/jevozunuwosoza95uqh.pdfIn PDF document text
    • http://carluxepaint.site/what_is_the_latest_edition_of_chicago_manual_of_stylec898e.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4488316/normal_6017088fdc15c.pdfIn PDF document text
    • https://cdn.sqhk.co/buzomesil/hheIifE/radewekuvelavidod.pdfIn PDF document text
    • http://salonop.xyz/the_dark_prophecy_booke25qx.pdfIn PDF document text
    • https://gimelasu.weebly.com/uploads/1/3/4/5/134513778/2868320.pdfIn PDF document text
    • http://zebrait.fun/principios_de_anatomia_y_fisiologia_tortora_gratispz92r.pdfIn PDF document text
    • https://xekafifem.weebly.com/uploads/1/3/4/6/134669887/934234.pdfIn PDF document text
    • http://pubgucbayim.com/24934359956tzq0f.pdfIn PDF document text
    • https://cdn.sqhk.co/setuboluraje/fHhchjG/wordworm_adventure_3ds.pdfIn PDF document text
    • https://giwelexe.weebly.com/uploads/1/3/0/8/130814055/3267593.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4419826/normal_5ff0409743b7e.pdfIn PDF document text
    • http://ewop.space/mefozowoxugelisidadug0t4b.pdfIn PDF document text
    • https://jegofedakosufe.weebly.com/uploads/1/3/5/3/135320490/42d9369.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/wetowuzuxit/raising_cane_s_sauce_nutrition_information.pdfIn PDF document text
    • https://s3.amazonaws.com/mokixetat/avery_label_templates_for_google_docs.pdfIn PDF document text
    • https://s3.amazonaws.com/rexogeguxosix/how_to_clean_lg_top_load_washer_filter.pdfIn PDF document text
    • https://s3.amazonaws.com/bisiku/advertising_promotion_and_new_media.pdfIn PDF document text
    • https://s3.amazonaws.com/zagapaxa/mind_maps_flow_charts.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
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000eda1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEDA1 5508 bytes
SHA-256: 290e4f8525c0a9522b9b3ef113ea4fc9a6bb1f7ca88b036423690e4aa5fea155
font_01_sfnt_off00010064.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10064 3120 bytes
SHA-256: fde507d3e12ec33e68adf7e75fc7402ffd28b0db1492fb6dd1e3c49ab7b9519b
font_02_sfnt_off00010ce9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10CE9 10348 bytes
SHA-256: 8b9e16a727a4b350ddbbdb8f8220c60fdf15137c596f689abbe98c26895e0ba7
font_03_sfnt_off00013095.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13095 16312 bytes
SHA-256: bf8f9ece8d9d74ce2d7a98a07ee1bb8f4056faf702b3b1702118181e85f1b939

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