Malicious PDF — malware analysis report

Static analysis result for SHA-256 405b572ccd2a66bc…

MALICIOUS

PDF

75.5 KB Created: 2021-03-19 17:47:28 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-22
MD5: 05f8379e2818cfce8be7079af2a9c63c SHA-1: 2900d3d3e064a70397271e2e4b786a1b1378633c SHA-256: 405b572ccd2a66bc71be6dfb2d4a5914c37709726ed3dd1669c6253e9e331c4e
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 0.9996

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://pelibifir.ru/strik?utm_term=final+fantasy+7+remake+strategy+guide+book+pdf PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4444644/normal_601f23aae72b1.pdfIn PDF document text
    • http://idealicaitalia-ufficiale.site/stand_by_me_movie_ostvhxbr.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4489734/normal_604dca909d082.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4462046/normal_60245856bfb9a.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4416514/normal_604027a1a2fce.pdfIn PDF document text
    • http://lizoguxumugef.mywebcommunity.org/periodic_table_labeled.pdfIn PDF document text
    • http://vomimaforotagi.mywebcommunity.org/pollo_loco_nutrition_keto_taco.pdfIn PDF document text
    • http://jekenufakewe.mypressonline.com/leggett_and_platt_50_series_adjustable_base_setup.pdfIn PDF document text
    • https://cdn.sqhk.co/fepefudasor/vlURgdW/7779096459.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4466165/normal_5fdd853a795b6.pdfIn PDF document text
    • https://cdn.sqhk.co/nefakovuwot/Coqhiic/87801082717.pdfIn PDF document text
    • https://cdn.sqhk.co/zedawuzijis/eMgjDgg/billie_eilish_my_future_release_date.pdfIn PDF document text
    • https://cdn.sqhk.co/jowapezo/CjbrEg7/56509580586.pdfIn PDF document text
    • https://cdn.sqhk.co/rifasidajika/y4Mhhcm/telecom_oss_bss_tutorial.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366325/normal_603bf51b67317.pdfIn PDF document text
    • http://reform-st.ru/33275196410andd1.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4377391/normal_603371f05904c.pdfIn PDF document text
    • http://sugameloxufe.mywebcommunity.org/gudomomadugufaxokus.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/sisaxu/bollywood_all_comedy_movies_free.pdfIn PDF document text
    • https://s3.amazonaws.com/wanasuvedigo/dimadem.pdfIn PDF document text
    • http://wiwosotu.myartsonline.com/cocina_criolla_argentina.pdfIn PDF document text
    • https://s3.amazonaws.com/titugome/invoice_format_in_excel_free.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_off0000e720.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE720 5700 bytes
SHA-256: cc467f56c2175c22af05d68e46d13b6be045da5cf06ecf1bde7db5fcde29ba61
font_01_sfnt_off0000fa8e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFA8E 11144 bytes
SHA-256: abac7c8b02ee46a67e547d1cd87c0206868601c74d4f0ae020aff3770af647b2

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