Malicious PDF — malware analysis report

Static analysis result for SHA-256 c0aa6801f68f4193…

MALICIOUS

PDF

72.3 KB Created: 2021-03-10 01:53:14 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-15
MD5: 4ff8e811d9ebd99a41f23dbcc2eccdac SHA-1: 243d4ae770320e4ef2db2ce9a6cc89b0098d99b3 SHA-256: c0aa6801f68f4193c8e1b33e4b90fc3afcdc00229a79a777fb1f92a8e20ce1fd
196 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 0.9993

Heuristics 6

  • 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 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://leonvi.ru/award?keyword=livro+cinquenta+tons+de+liberdade+pdf+online PDF link annotation
    • http://kitafoged.medianewsonline.com/44430791638.pdfIn PDF document text
    • https://tiwabegi.weebly.com/uploads/1/3/0/8/130874513/suruvegobaku.pdfIn PDF document text
    • https://sopogokatoluj.weebly.com/uploads/1/3/1/0/131071191/7553034.pdfIn PDF document text
    • https://vujilesozigo.weebly.com/uploads/1/3/4/0/134042384/wosejipub.pdfIn PDF document text
    • http://jerimujolegem.medianewsonline.com/abiy_ahmed_book.pdfIn PDF document text
    • http://powajaxib.medianewsonline.com/how_do_i_pair_my_costco_hearing_aids.pdfIn PDF document text
    • http://saroforati.medianewsonline.com/planes_y_programas_2011_primaria_sexto_grado_matematicas.pdfIn PDF document text
    • http://mapotilij.mygamesonline.org/79551078853.pdfIn PDF document text
    • https://wedemewimobuxet.weebly.com/uploads/1/3/4/3/134309086/vomap.pdfIn PDF document text
    • https://balevowoperat.weebly.com/uploads/1/3/1/3/131397989/refil.pdfIn PDF document text
    • https://werotibumef.weebly.com/uploads/1/3/4/9/134900185/0a48f3.pdfIn PDF document text
    • https://zufojemesegogof.weebly.com/uploads/1/3/4/7/134753559/lawamuvol.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://gupizamowakop.myartsonline.com/1993_lexus_sc300_manual_transmission.pdfIn PDF document text
    • https://s3.amazonaws.com/wovedukevikov/http_cg_song_3gp.pdfIn PDF document text
    • https://s3.amazonaws.com/fulosobezur/car_racing_games_apk_free.pdfIn PDF document text
    • http://bodegifu.atwebpages.com/calories_in_dunkin_mocha_swirl_pump.pdfIn PDF document text
    • https://s3.amazonaws.com/mujesogi/48418593004.pdfIn PDF document text
    • https://s3.amazonaws.com/wizuluworafid/rulabifimoj.pdfIn PDF document text
    • https://s3.amazonaws.com/niwotipugonuvoz/64773665478.pdfIn PDF document text
    • https://s3.amazonaws.com/boduxatavepe/35829787730.pdfIn PDF document text
    • http://palelezugob.onlinewebshop.net/tafobopopobulafuvu.pdfIn PDF document text
    • https://s3.amazonaws.com/gofiguj/dadiruwezo.pdfIn PDF document text
    • https://s3.amazonaws.com/bisute/30519619798.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_off0000da59.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDA59 5416 bytes
SHA-256: eba20051737aaf7c0b85871a721f03b9c82e0c5ece5abce975a9afdf1472b2bf
font_01_sfnt_off0000ecd2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xECD2 11992 bytes
SHA-256: 8f4d2a36f87f459701e369d4ea448b09785f00b64dd2a09ebc7a3ce466165d59

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