Malicious PDF — malware analysis report

Static analysis result for SHA-256 23eef50f45067e2e…

MALICIOUS

PDF

45.5 KB Created: 2020-11-01 20:34:02 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2020-12-26
MD5: 9e76b773fa8d253544b4b49a83192bdb SHA-1: 203a2e227087b36f919c297167f46a0338cb20de SHA-256: 23eef50f45067e2e37976bee08085b440160d536a644172e94f4925e9063430d
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=shop+titans+hacked+apk In PDF document text
    • https://vibebivenef.weebly.com/uploads/1/3/1/4/131412032/pebuxoz.pdfIn PDF document text
    • https://putojedenavaxo.weebly.com/uploads/1/3/2/6/132683165/tekata.pdfIn PDF document text
    • http://www.ascendercorp.com/In extracted file (font_00_sfnt_off0000665b.bin)
    • http://www.ascendercorp.com/typedesigners.htmlIn extracted file (font_00_sfnt_off0000665b.bin)
    • http://www.daltonmaag.com/In extracted file (font_02_sfnt_off00009af8.bin)
    • https://uploads.strikinglycdn.com/files/d6b43501-5618-4d31-9321-e12b5fa5db38/torafezisurilaridil.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0503/3813/6232/files/dalimosamuzu.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0501/8818/9869/files/tera_warrior_guide_2019.pdfIn PDF document text
    • https://s3.amazonaws.com/jedobufudajewu/solving_linear_equations_with_fractions.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0268/8178/6032/files/28827192410.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0481/6250/4855/files/mutantes_e_malfeitores_3e.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/3033/2060/files/multi_messenger_app_android.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0436/0493/4814/files/hp_touchsmart_600_manual.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0501/3936/5546/files/93955466424.pdfIn PDF document text
    • https://s3.amazonaws.com/wonoti/thyristor_applications.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_off0000665b.bin)

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000665b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x665B 4988 bytes
SHA-256: 31a977ca90ff7b141c2739a70e336361ac472831b9749a62dc095ba26770f33f
font_01_sfnt_off0000773b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x773B 10520 bytes
SHA-256: 3ef86524f8594e30b825a9e9a1eca202de8a17861d3942e3bf781665ed2b2cac
font_02_sfnt_off00009af8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x9AF8 4324 bytes
SHA-256: b50a2106bf82917db0cd3cf88f63c5e8cc3298b343ace5cffc591b35df33d24c