Malicious PDF — malware analysis report

Static analysis result for SHA-256 f23b18887e91ddd4…

MALICIOUS

PDF

70.2 KB Created: 2021-02-28 21:02:06 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-04-10
MD5: cf0e72be7a6e675b2a071cd3c8b5e051 SHA-1: 724343b050f0ff5f948d6ed359635a50f2454e4b SHA-256: f23b18887e91ddd4af2d35d3903085eadd21d0f4198e495f196ec7560d6449c0
196 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

Heuristics 6

  • 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 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.
  • Image lure linking to an SEO redirector (free-download phishing) high PDF_SEO_UTM_REDIRECTOR_LINK
    PDF embeds an image with little or no body text and a clickable link to a multi-word utm_term / FeedBurner-proxied SEO redirector — the 'free ebook / solution-manual / document download' phishing family that ranks for natural-language search queries and routes the user into a payload/redirect chain. The PDF carries no exploit; the risk is the linked destination. Flagged structurally (image lure + SEO redirector) so it does not depend on a ClamAV/ML signature, and regardless of how many filler text pages the lure carries.
  • 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://botokaw.ru/award?keyword=brandy+melville+locations+in+northern+california PDF link annotation
    • https://tazivori.weebly.com/uploads/1/3/1/4/131438523/ff152ffe2fd3.pdfIn PDF document text
    • http://volizaj.iblogger.org/route_219_park_and_ride.pdfIn PDF document text
    • https://cdn.sqhk.co/noviraxat/sg4ifhj/44111321699.pdfIn PDF document text
    • http://fefiwizam.sportsontheweb.net/why_is_my_phone_saying_no_network_registered.pdfIn PDF document text
    • https://cdn.sqhk.co/verexumifo/iitiAiq/rudofo.pdfIn PDF document text
    • https://cdn.sqhk.co/genizataxom/hfdjiih/short_funny_life_quotes_to_live_by.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4459794/normal_601b3f867f510.pdfIn PDF document text
    • https://xukizawumu.weebly.com/uploads/1/3/1/3/131380236/vefukal-ridoxufifa-xabafedonukes-tetivibimiketij.pdfIn PDF document text
    • https://dukilukisa.weebly.com/uploads/1/3/1/0/131070258/zepitegojiweso.pdfIn PDF document text
    • http://nemosixumeki.mypressonline.com/alto_shaam_halo_heat.pdfIn PDF document text
    • http://bewewafip.scienceontheweb.net/the_killing_joke_ending_batgirl.pdfIn PDF document text
    • https://cdn.sqhk.co/riraxizilob/e7hfea8/29880495162.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4407807/normal_6016e3c72a864.pdfIn PDF document text
    • https://vururera.weebly.com/uploads/1/3/4/4/134493513/3760460.pdfIn PDF document text
    • https://jirugewozori.weebly.com/uploads/1/3/4/8/134898712/dezefiwuluxupexeg.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://s3.amazonaws.com/jazamerijekufol/74362826258.pdfIn PDF document text
    • https://s3.amazonaws.com/tuxenipup/simple_factorisation_worksheet.pdfIn PDF document text
    • https://s3.amazonaws.com/tipikaxe/bufferedreader_android_size.pdfIn PDF document text
    • https://s3.amazonaws.com/jiguwuzobozobaz/the_bell_jar_study_guide.pdfIn PDF document text
    • http://sasukagisodubex.onlinewebshop.net/sopenaziroxugifomuta.pdfIn PDF document text
    • https://s3.amazonaws.com/xefejevife/heat_stroke_management_guidelines.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_off0000c8ca.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC8CA 5260 bytes
SHA-256: 843f56be0177dbd1d594c1356a25dd7a157418e86d345731e9cdde6438252bcd
font_01_sfnt_off0000da81.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDA81 10284 bytes
SHA-256: 9084fe98ad3c7b3c97fc0c1bc53dc67a8837f48188b7298b9a0897edb38e468d
font_02_sfnt_off0000fd3f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFD3F 4324 bytes
SHA-256: 7f6049e5011acf0e8581793f2bc2bb947aac2929fdb77abc318b2a6155c1ef71