Malicious PDF — malware analysis report

Static analysis result for SHA-256 b35a68371c2d0f54…

MALICIOUS

PDF

71.4 KB Created: 2021-03-05 20:47:55 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-04-25
MD5: 58efc0cd762bd06db8c6a8c665000d58 SHA-1: c44108b44a7513ae3676bbfc7b02e3f5ba1f30b3 SHA-256: b35a68371c2d0f54539fe9e4f5c79382fc5563bb02c7313f1e79e1f3e3aef38a
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://xajibur.ru/wix?keyword=pokemon+sun+apk+download+free PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4392472/normal_601d67ea27a3a.pdfIn PDF document text
    • http://ig-copyrightnotice.com/67040574097xde9f.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4416792/normal_602fc6c65e5ce.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4496816/normal_60020f7e00a8a.pdfIn PDF document text
    • http://frut-tree.site/wiwuxusotobigotogabokugozk76zu.pdfIn PDF document text
    • http://bupetud.xyz/how_to_install_evenflo_car_seat_base_rear_facingrhsx1.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4403814/normal_5fe2bdeca7147.pdfIn PDF document text
    • http://wufamega.scienceontheweb.net/ganuraxibowidonozij.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4408992/normal_5fe70058aecb9.pdfIn PDF document text
    • http://websporizlehd.com/difiguvazubzntj.pdfIn PDF document text
    • http://pigalimiru.medianewsonline.com/how_do_you_sell_bitcoins_on_cash_app.pdfIn PDF document text
    • http://extrameets.fun/how_to_operate_bosch_hammer_drillpfwfy.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/fusidejebi/julipezasumofetaloba.pdfIn PDF document text
    • https://s3.amazonaws.com/gajakelegeza/libertango_sheet_music_marimba.pdfIn PDF document text
    • https://s3.amazonaws.com/dazuxujepov/miss_universe_2015_final_question_and_answer.pdfIn PDF document text
    • https://s3.amazonaws.com/povelenavuviw/saluxofanakavabatininu.pdfIn PDF document text
    • https://c2bc7a71-cb21-434c-84f6-8d2fc09ed56d.filesusr.com/ugd/03ae60_218f3ef3da5b48f69fe400c33b14e1e0.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/5f79bb0e-24d4-4cbc-b43e-be80725fae9b/4489886893.pdfIn PDF document text
    • https://78e27e65-9996-4239-a63d-7a21722db537.filesusr.com/ugd/03f576_de31c90f98dc4337bffa8dcded74824d.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/mogedozara/37446267710.pdfIn PDF document text
    • https://72cee60b-533f-4fda-9f40-87b1bb6f0553.filesusr.com/ugd/590778_0b33fd2b88744aa79004713422a58906.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/13a2b1e8-7e8a-40e3-8fdf-f5471cf618c4/how_to_share_a_file_on_facebook_group.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_off0000dbca.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDBCA 5344 bytes
SHA-256: efa9974e589bc7b8a90ac76840f2cf7d765b610d56beb8226e2440f55c019f0d
font_01_sfnt_off0000edfb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEDFB 10032 bytes
SHA-256: 13ed9c29f9ae9ad34d27c03020e0003554d39cb4526a1151014aeaa93c2a94ab

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