Malicious PDF — malware analysis report

Static analysis result for SHA-256 4a203454c879a9a4…

MALICIOUS

PDF

39.1 KB Created: 2020-10-26 11:57:56 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2020-12-25
MD5: 65290375da1bd616066dc66da8b2e0fb SHA-1: 6472bcdadea425887c1fa853205bffeeda5bcc7e SHA-256: 4a203454c879a9a4582fd4f3d17319b373ea56c71d6f6535b83cd33a110092e9
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://gettraff.ru/aws?keyword=lewis+sperry+chafer+systematic+theology+free+pdf In PDF document text
    • https://cdn-cms.f-static.net/uploads/4384469/normal_5f8fb4b0d9f27.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4378160/normal_5f8d2710daec1.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4381101/normal_5f8f56290f63d.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4378165/normal_5f8e8339711c6.pdfIn PDF document text
    • https://xijonezamo.weebly.com/uploads/1/3/1/4/131407630/fc8d98320e540.pdfIn PDF document text
    • https://zesopupejilit.weebly.com/uploads/1/3/0/7/130738861/813cf1644869f.pdfIn PDF document text
    • https://sapakokejepudig.weebly.com/uploads/1/3/4/4/134457578/bb22a9b14.pdfIn PDF document text
    • https://tivakoxidedopa.weebly.com/uploads/1/3/0/7/130776298/guxazitukof_rujineba_dupif_rezuvin.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4375889/normal_5f8f2ee49e59a.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4386837/normal_5f8e8b407c565.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/7451/9191/files/suwijep.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0496/1049/0022/files/tapone.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0492/4188/2780/files/union_city_ga_movie_theater.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0500/3670/3385/files/90077116545.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0479/3588/1372/files/airtel_international_roaming_charges.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0483/7831/4903/files/23857157664.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0497/9110/7233/files/new_england_patriots_playbook.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/d9877d86-f941-4107-bfdd-7cd17f24a200/61309741872.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/d1a7192a-8ce2-4be4-9219-4c8340f0d595/panonibalete.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/682cfd9d-da65-47eb-8242-2bfb85447dba/openiv_2.6_gta_5.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/fb1d4a5a-0868-4c6e-a637-eb8728efea41/36097043386.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/83e46cb9-5378-40b0-9aec-1f80bde53717/daloleziwemidorifubilaze.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_off0000571d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x571D 5704 bytes
SHA-256: 7a3cdbbdd73c680f6ff375ab229abf1f247e97622a5f11bf444760f4eac055ec
font_01_sfnt_off00006a7c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6A7C 10680 bytes
SHA-256: a42fa1fe20fa96878a7a36c59e0efbc6a1cdce52860b7730c2838c107e666711

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