Malicious PDF — malware analysis report

Static analysis result for SHA-256 627695afcfde2657…

MALICIOUS

PDF

37.9 KB Created: 2020-10-05 17:40:25 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-10
MD5: 527dba3adf54b34aa933773e5481fd56 SHA-1: 62c8b5ca29e01fdd9aba33a01099a76ac3597994 SHA-256: 627695afcfde2657daa39e1c9b0ad983de9013e89658c0186a316c3ff3286c2a
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=bangla+natoker+boi+pdf In PDF document text
    • http://fuwipiwad.wellbee-ing.com/uploads/1/3/0/7/130738848/7080403.pdfIn PDF document text
    • http://rutet.lilylunaa.com/uploads/1/3/2/3/132303219/mekurudavejiwunoge.pdfIn PDF document text
    • http://files.impalac.com/uploads/1/3/0/7/130740264/xufegir.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • https://cdn.shopify.com/s/files/1/0438/3971/7538/files/walt_disney_presents_tv_series.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0485/0250/5633/files/inuyasha_complete_series_manga.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/2137/7434/files/meepo_dota_2_sets.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0438/9024/5787/files/37690721555.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/7526/4924/files/poe_corruption_altar_gem.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0438/2657/7570/files/kiwadegepax.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/1191/5421/files/pou_apk_uptodown.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/7052/9436/files/bpa_style_and_reference_manual_2016.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/71718f38-5570-4282-b9f5-5971abfeb4b1/birifuwibevidewemanaz.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/8091128f-48a2-4698-bd67-0ab7352fa8ba/xexivovozamegakoz.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/e277c866-9696-4bfd-95ec-428da3c5ac93/16288786148.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/0e3fadc7-25f6-449c-93af-dc8fcbb7dd38/guguse.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000046cf.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x46CF 5072 bytes
SHA-256: b8c47df61a2c1340aa24beb28086d4a19e986ecb5099562beeca57604036a9c5
font_01_sfnt_off0000581a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x581A 10864 bytes
SHA-256: 698ead8bfe8c92bbd0f8c9804ca368a9fe1ffb2fbed609f15531864140eee691
font_02_sfnt_off00007cff.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7CFF 4324 bytes
SHA-256: 4fcfa7c68d76e23b667942a3ac892d2d5d88346478daafc61479ad4df4af3dd3

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