Malicious PDF — malware analysis report

Static analysis result for SHA-256 32f3429b0bae6a2c…

MALICIOUS

PDF

40.1 KB Created: 2020-10-08 15:04:18 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-15
MD5: a9159926ee7b2fb710f126f64d23dd11 SHA-1: 9d9e35e97efdab8e3df613abd75537e61c8e65d1 SHA-256: 32f3429b0bae6a2cb7d7f05d784d123c7e81c36759da7240b2648444ea97dd09
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=the+norton+anthology+of+english+lite In PDF document text
    • https://site-1039863.mozfiles.com/files/1039863/libadufufemiguba.pdfIn PDF document text
    • https://site-1041501.mozfiles.com/files/1041501/53028581823.pdfIn PDF document text
    • http://files.hilaryguise.com/uploads/1/3/1/3/131382239/9f594a8963.pdfIn PDF document text
    • http://jamaj.theopenbus.com/uploads/1/3/2/6/132683138/vamusedejagi.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/1/0437/9607/0549/files/50093667573.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0486/1381/8536/files/heat_and_mass_transfer_a_practical_approach_4th_edition_solution_manual.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/8860/8418/files/artemis_fowl_the_lost_colony_weebly.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/9964/4314/files/42520199795.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0487/7382/4678/files/the_scorch_trials.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/f9cad5da-3d56-49f1-ba1b-954fbdac6d61/69525000361.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/f31b332d-5764-4942-96fd-17e4cb6da12d/64196761926.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/80f905ba-0c9f-4aad-9265-94c08f12d155/86501533237.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/c18f489b-1fd3-4826-8cf7-2528f9804f43/fogifaxemalogavedurux.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_off00005f5d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5F5D 5080 bytes
SHA-256: 15433d34d77b057bdeefabb75f0aa8555fcf7b73cfdbf35f072277d16db69194
font_01_sfnt_off000070af.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x70AF 10180 bytes
SHA-256: f012c6c3c9fe23bcccd58b68bd7ba697e78cbe9ba47a1f04d06fd09a92f0a3c0

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