Malicious PDF — malware analysis report

Static analysis result for SHA-256 a320a0ff6b96be98…

MALICIOUS

PDF

60.9 KB Created: 2020-10-06 10:18:45 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-10
MD5: d8e588c378695f085f5ac2edaddafa2e SHA-1: a0610c4e8689dc3ae3a001bdd620f163d47e77b1 SHA-256: a320a0ff6b96be984369742284569acd63a7ff86754baa1806589db4147109a7
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=pitting+edema+vs+non+pitting+edema+pdf In PDF document text
    • http://files.rautiaguitars.net/uploads/1/3/1/4/131454143/7a6f3.pdfIn PDF document text
    • http://rafupiwal.greatislandgardenclub.org/uploads/1/3/1/1/131163991/xobavum-xuwiweji.pdfIn PDF document text
    • http://files.academyofhirudotherapy.org/uploads/1/3/1/3/131379040/34780cc3971ea.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.opentle.orgIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • https://cdn.shopify.com/s/files/1/0500/9093/4437/files/41278219509.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0440/1269/9798/files/fikewenanulekekopuk.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0438/5095/6960/files/us_history_civil_war_word_search_answers.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/fdda9efd-4494-4a14-9ccd-03e4bbe33b7d/pezefib.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/fe743e89-6695-4464-ba29-108550a4ef4f/2138706300.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/d8ac0af5-76ef-4cc1-b063-d5d79328ea79/sigozejatapeximaxi.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/4990/9415/files/a_cup_of_tea_summary.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0481/6227/5477/files/top_secret_famous_recipes.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/1070/3010/files/scrum_for_dummies_free.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
    • http://www.gnu.org/licenses/gpl.htmlIn PDF document text

Extracted artifacts 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00009050.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x9050 5084 bytes
SHA-256: caee9cbcae739f2b475606ca31ee6f8851dfae554e68b3b31aa548040828ff80
font_01_sfnt_off0000a182.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xA182 6068 bytes
SHA-256: 7a02da73c5ff24218d04b188db7d31ceb9303d5dedd43b645f18a615a19d9b6a
font_02_sfnt_off0000b133.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB133 11516 bytes
SHA-256: bc589ee919ea66915c8af4b2b40371677b2497f3d6cc7b127fbab150cf374077
font_03_sfnt_off0000d828.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD828 4324 bytes
SHA-256: d1f4a20f0e35a0564be54678b929bb8c711862c507f070c2b9a6abea8daf4378

Open this report in the interactive analyzer, or submit your own file for analysis.