Malicious PDF — malware analysis report

Static analysis result for SHA-256 f96bd8db2df23623…

MALICIOUS

PDF

78.2 KB Created: 2021-03-23 23:53:38 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-22
MD5: 6347ee93c585af9775d531588fd8fc91 SHA-1: 219babe4d244ca7f3bba26507aa12a4f5bdb1e2d SHA-256: f96bd8db2df236239a9c8d558ef0ff5021e218d1b5ab4e661201dfd5cfb710f7
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-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://midufefew.ru/wix?keyword=disney+princess+royal+shimmer+doll+collection PDF link annotation
    • https://cdn.sqhk.co/ratugetaj/smjjuAS/senior_designer_cover_letter_template.pdfIn PDF document text
    • https://lijuvimu.weebly.com/uploads/1/3/0/7/130775306/6a9e6551a5.pdfIn PDF document text
    • https://jiwedizuku.weebly.com/uploads/1/3/4/3/134310564/3709303.pdfIn PDF document text
    • http://shopmzm.site/the_innovators_dilemma_barnes_and_noble2w1vo.pdfIn PDF document text
    • http://mmamba.ru/binding_the_strongman_free_downloadekldv.pdfIn PDF document text
    • https://nuxelimifa.weebly.com/uploads/1/3/0/7/130776070/ae467.pdfIn PDF document text
    • https://cdn.sqhk.co/saboxiwago/rjhhjih/nopiva.pdfIn PDF document text
    • https://cdn.sqhk.co/lijedubejop/OEgcyBj/aces_of_the_luftwaffe_ps4_test.pdfIn PDF document text
    • http://vezdesami.ru/pump_flange_size_guide5zxiu.pdfIn PDF document text
    • https://xepesirivow.weebly.com/uploads/1/3/1/4/131408502/d49da5abd59c.pdfIn PDF document text
    • https://ladukupubavar.weebly.com/uploads/1/3/0/7/130776836/450035a05.pdfIn PDF document text
    • http://igclienteam.com/how_to_read_price_volume_trendhmy5s.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/nosepevozux/thermador_microwave_oven_reviews.pdfIn PDF document text
    • https://s3.amazonaws.com/kalanejaxutilif/movie_pirates_of_the_caribbean.pdfIn PDF document text
    • https://36425c1f-c329-48aa-845d-1f8252cb45c8.filesusr.com/ugd/01d500_ce2306b1de2b46e8980b67522e65e732.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/e517ca0c-826d-40c1-9025-9cae7e0c0357/formas_de_comunicacin_escrita_en_la_empresa.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/30212730-dc9b-4ac6-bd9c-3346cb48a240/70926804169.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/03e89fe7-d4f3-4285-b60f-e14c41582bc5/interior_designing_work_in_dubai.pdfIn PDF document text
    • https://s3.amazonaws.com/verirejon/witazimo.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/59d5d633-813e-42ab-968b-19be6a32b83c/kipad.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/30e682d5-df10-40cb-bf8e-aac48465120b/how_to_beat_the_stock_market_game.pdfIn PDF document text
    • https://c504e2ef-f928-4e80-b5b1-fc05046f432e.filesusr.com/ugd/247f25_5d78b564e167445c83e0e0495435dd54.pdf?index=trueIn 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_off0000f136.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF136 5416 bytes
SHA-256: 181b5d8bfa618a1d5cc7902a91efc19388ba6419177fdb0d5be05c61ea9e2872
font_01_sfnt_off0001037d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1037D 11728 bytes
SHA-256: ea9b5e300dca6b8adf20bb374e16a659092c77708dcfdf25314be5a1dcefe38f

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