Malicious PDF — malware analysis report

Static analysis result for SHA-256 e021609729e331bc…

MALICIOUS

PDF

38.4 KB Created: 2020-09-30 07:41:55 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-10
MD5: ffa2d465c252d41dcda5fe856b2be7ac SHA-1: 73fd14f400b12403df871ea0dc45c2bbcf4f010d SHA-256: e021609729e331bcdb424dcf7d3ea873c4d06e453cd379da4235c0b273b370ac
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/strik?keyword=absorbance+spectrophotometer+pdf In PDF document text
    • https://site-1036667.mozfiles.com/files/1036667/zorobudusirugijufipa.pdfIn PDF document text
    • https://site-1036840.mozfiles.com/files/1036840/kutewefalokiletaxagoze.pdfIn PDF document text
    • https://site-1036980.mozfiles.com/files/1036980/dokewa.pdfIn PDF document text
    • https://site-1036838.mozfiles.com/files/1036838/97790876315.pdfIn PDF document text
    • http://files.safercompass.com/uploads/1/3/1/6/131606262/befuv.pdfIn PDF document text
    • http://files.globalconcreteroses.com/uploads/1/3/0/7/130775639/tuwigenu-wazuzajizejuj.pdfIn PDF document text
    • http://files.reciperefitness.com/uploads/1/3/1/1/131163878/3588558.pdfIn PDF document text
    • http://punar.ricogop.org/uploads/1/3/2/6/132696465/ebbac15.pdfIn PDF document text
    • http://files.getasianfood.com/uploads/1/3/0/8/130874012/kowavajakase-pegaxix.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/1/0432/7519/0422/files/facebook_live_streaming_software_for_android.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/7099/6128/files/jatexe.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/6546/6270/files/the_ultimate_guide_to_aliexpress_dro.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0427/9648/2727/files/metro_map_latest.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/5d61e199-b6e9-4d6d-9614-ae78147a7402/99576324329.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/e92a98b8-29e6-4257-ab8f-a1ef97c730d7/zoxusokokimowunaxeju.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/18e30a8a-d31a-47f2-afac-4943e0c3437d/rekaginudawusosani.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_off000057a9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x57A9 5492 bytes
SHA-256: d70432fb8c24e85de16c153dc4a36afb38ce972143b49ed6259539b59f5acea4
font_01_sfnt_off00006a26.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6A26 10324 bytes
SHA-256: afed4b9e8bac9bc7661a26596e9c9ed7a6b5c514df1dee042cd78819a394a4cf

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