Malicious PDF — malware analysis report

Static analysis result for SHA-256 37196f5e20fb7cb5…

MALICIOUS

PDF

40.7 KB Created: 2020-10-26 19:51:46 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2020-12-26
MD5: 3cdb3c3f1f35188f86d2cbd28a31b87e SHA-1: 0ed87836f6d1776e280e451317de5682307c7fea SHA-256: 37196f5e20fb7cb5a544dac099cb6b09c59674019a20917ae864583db70c65be
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/strik?keyword=dark+oak+tree+not+growing In PDF document text
    • https://sepikupi.weebly.com/uploads/1/3/0/7/130738949/gasis_beviranajaxid.pdfIn PDF document text
    • https://kagilovudugavap.weebly.com/uploads/1/3/1/1/131164538/827f20babb54.pdfIn PDF document text
    • https://dunujamovexen.weebly.com/uploads/1/3/4/3/134361976/047a0a97.pdfIn PDF document text
    • https://gemaxudemaxepeb.weebly.com/uploads/1/3/1/0/131070646/jevumoja.pdfIn PDF document text
    • http://www.ascendercorp.com/In extracted file (font_00_sfnt_off00006319.bin)
    • http://www.ascendercorp.com/typedesigners.htmlIn extracted file (font_00_sfnt_off00006319.bin)
    • https://cdn.shopify.com/s/files/1/0498/7869/6094/files/79059253795.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/2408/0282/files/wetewejaxa.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0266/8055/7755/files/hvac_wire_size_chart.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/1040/0153/files/rifelodidukuva.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0483/3804/3031/files/kelebi.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/5a9cad98-954e-4918-98a3-54124511ce94/subudipadudofu.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/c82937f3-a927-4b49-a3e6-09dd7fc7e1bb/26957134349.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/bdfc4ab4-977e-4faf-9961-223aef60497c/nakaxu.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/8bd8f70b-ce5a-4647-8c20-d8a32d31a136/the_lords_of_creation_free.pdfIn PDF document text
    • https://s3.amazonaws.com/tetazino/lawukezerojulijodopejom.pdfIn PDF document text
    • https://s3.amazonaws.com/wixamupelinere/clinical_anatomy_of_the_eye_snell_free_download.pdfIn PDF document text
    • https://s3.amazonaws.com/sorogamat/soul_eater_manga_english.pdfIn PDF document text
    • https://s3.amazonaws.com/jupevuxirapi/ardhanarishwara_stotram_in_telugu.pdfIn PDF document text
    • https://s3.amazonaws.com/dixaleko/electronics_engineering_notes_in_hindi.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0500/8392/2083/files/sound_recorder_editor_apk.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/4168/5665/files/semolisajeselimudolevuj.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0439/4087/2350/files/87764833044.pdfIn PDF document text
    • https://s3.amazonaws.com/purixifusipelid/30870306593.pdfIn PDF document text
    • https://s3.amazonaws.com/henghuili-files/xukatu.pdfIn PDF document text
    • https://s3.amazonaws.com/dukajevo/lemixojamujavoritami.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_off00006319.bin)

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00006319.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6319 4796 bytes
SHA-256: a390da6e8f7ea7cd741ec79897db9395180b72df42a645442fb0343b79be46c4
font_01_sfnt_off0000739b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x739B 9976 bytes
SHA-256: 7f21e24f4bc3d5be4eb46286422921034d39bddc6733fbaca50498714a8a258a