Malicious PDF — malware analysis report

Static analysis result for SHA-256 df15c101f24804c6…

MALICIOUS

PDF

79.0 KB Created: 2021-04-02 06:20:32 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-25
MD5: 35f520d1b742c8d5a0ef4b79b2dffcad SHA-1: 198b234468700a483fa0c3b74498fd3d9135ebf1 SHA-256: df15c101f24804c61189c767568c744dac3d302f16a5d78e700d8fcc789089d9
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://golowaki.ru/wix?keyword=how+do+tree+frogs+protect+themselves PDF link annotation
    • https://vopenunajobip.weebly.com/uploads/1/3/2/3/132302870/66bc64bc.pdfIn PDF document text
    • https://gedozunirep.weebly.com/uploads/1/3/1/0/131070722/xedetunoruv.pdfIn PDF document text
    • http://wwbook.org/rational_recovery_book_reviewvllbw.pdfIn PDF document text
    • http://alcexpress1.xyz/gusomevaveb00pwc.pdfIn PDF document text
    • http://uscovidcharts.com/why_solid_snake_kills_big_bosshcrcy.pdfIn PDF document text
    • https://palivifu.weebly.com/uploads/1/3/3/9/133986562/ratutevagamejuwiv.pdfIn PDF document text
    • http://ompala.store/voxarevetelbmkn.pdfIn PDF document text
    • http://lifeit.pro/plantilla_con_margenes_para_escribirtqwhr.pdfIn PDF document text
    • http://esagafow.fun/1649001458copkp.pdfIn PDF document text
    • https://popuverixi.weebly.com/uploads/1/3/1/4/131438274/688d930e462b5d.pdfIn PDF document text
    • https://poxuroli.weebly.com/uploads/1/3/0/7/130738943/3997719.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4409243/normal_5fe73e7a1273b.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4413455/normal_604cfc5007274.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4416326/normal_60246f2267562.pdfIn PDF document text
    • http://copyright-securityx.com/demubufoj2tl5.pdfIn PDF document text
    • http://s7hmus.org/67851717766dkr04.pdfIn PDF document text
    • http://photoforce.ru/how_to_setup_my_fitbit_flex_2uh80o.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • https://uploads.strikinglycdn.com/files/39da0434-7424-4f69-9bda-1aef54647f2f/bifuwukofuwugapuwafop.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/b1b1bfa7-76f2-44c2-80bc-6e3576191b1c/imovie_mac_tutorial_youtube.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/b81ef188-6e6f-47f6-b5e6-2bc2c92e055c/vipepikazo.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/e0763a5c-45a7-4ac3-81d6-30f744b24aca/how_many_watts_is_a_small_microwave.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000ecd8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xECD8 5108 bytes
SHA-256: 19fdb9a5f3a20030e602bbca4b54ce8899eb6f8f566d18a409c042ba48182eb0
font_01_sfnt_off0000fe62.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFE62 9940 bytes
SHA-256: 6f89336f9504e72aed89cfa59c9ca9d74712abacb61e2af2424818f64cac76cb
font_02_sfnt_off00012054.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12054 4324 bytes
SHA-256: 4fcfa7c68d76e23b667942a3ac892d2d5d88346478daafc61479ad4df4af3dd3

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