Malicious PDF — malware analysis report

Static analysis result for SHA-256 96b77edd70a1d693…

MALICIOUS

PDF

44.4 KB Created: 2020-10-28 12:01:46 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2020-12-26
MD5: cb7783bc36f18632ca28ddfcbfe90b1b SHA-1: ad73b18f616dae9096b977366b90fc6de7f26972 SHA-256: 96b77edd70a1d69361dff13e9dc30b4ce646a827d3403fd2f618392de50a42a9
194 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 5

  • PDF links to known malicious redirector infrastructure critical PDF_MALICIOUS_REDIRECTOR_LINK
    PDF contains a clickable URI to redirector infrastructure used by a known malicious PDF SEO/adware delivery campaign. These documents typically rely on user interaction and redirect chains rather than a PDF parser vulnerability.
  • 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.
  • 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://cctraff.ru/aws?keyword=blood+on+the+river+book+pdf In PDF document text
    • https://leruzifu.weebly.com/uploads/1/3/2/3/132302941/rexuwatuxubite.pdfIn PDF document text
    • https://naxedomabaxa.weebly.com/uploads/1/3/1/6/131606472/2258781.pdfIn PDF document text
    • https://sejejuno.weebly.com/uploads/1/3/4/4/134447194/vukopiw.pdfIn PDF document text
    • https://dojulukasinu.weebly.com/uploads/1/3/0/7/130776790/lalatim.pdfIn PDF document text
    • http://www.ascendercorp.com/In extracted file (font_00_sfnt_off000070bb.bin)
    • http://www.ascendercorp.com/typedesigners.htmlIn extracted file (font_00_sfnt_off000070bb.bin)
    • https://cdn.shopify.com/s/files/1/0268/9178/0281/files/ziludopavulovurevawoga.pdfIn PDF document text
    • https://s3.amazonaws.com/levumoduf/gelifisopuxafebomof.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0479/0380/1510/files/greek_baby_girl_names_unique.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0480/5322/3588/files/faxetusisatemoluzara.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/9886/4800/files/pixel_car_racer_apk_mod_2020.pdfIn PDF document text
    • https://s3.amazonaws.com/setaxilitozuko/capillary_electrophoresis_principles_practice_and_applications.pdfIn PDF document text
    • https://s3.amazonaws.com/henghuili-files2/apes_textbook_friedland.pdfIn PDF document text
    • https://s3.amazonaws.com/bifamomove/isaias_hernandes_dias_lopes.pdfIn PDF document text
    • https://s3.amazonaws.com/jedaxopopuko/audience_analysis_in_presentation.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/5153d3f7-86a9-44a5-bb4a-1bc0f73527dd/general_computer_knowledge_questions_and_answers.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/051a6388-b652-49b7-8367-d6bd50dd6ca1/wozelikurena.pdfIn PDF document text
    • https://s3.amazonaws.com/kavitokolezub/counterfeit_gods.pdfIn PDF document text
    • https://s3.amazonaws.com/jijumupade/vutamusilezupunerujo.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/afa5f6ea-215b-4beb-8f79-dcba5e25f1d9/semijivirilaru.pdfIn PDF document text
    • https://s3.amazonaws.com/zugutixe/cauchy_euler_differential_equation.pdfIn PDF document text
    • https://s3.amazonaws.com/zinudipir/hp_smart_app_scan_to.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 extracted file (font_00_sfnt_off000070bb.bin)

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000070bb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x70BB 5052 bytes
SHA-256: 5b015d9ab54881845aa360158e7a2a5bc66a9dcd2be43a4825b6be5c5752a60d
font_01_sfnt_off000081e9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x81E9 10120 bytes
SHA-256: 626e6fcfd76e53d31578856fa18b5cfbc10fc150e98f386d2f6249892aaa1835