Malicious PDF — malware analysis report

Static analysis result for SHA-256 846cbf3829c0d13e…

MALICIOUS

PDF

37.3 KB Created: 2020-10-19 02:46:30 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-15
MD5: 610a571bc7adf8f822d4278ad9828064 SHA-1: e1c1b1056671e9f89fdffcdccd874f305f65d6d5 SHA-256: 846cbf3829c0d13ead81396c2875f47b445295d1f33de951ccc5cc160d365219
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=war+of+dragons+cheats In PDF document text
    • https://cdn-cms.f-static.net/uploads/4367656/normal_5f894baa772b8.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366020/normal_5f8896c79fc1d.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4385633/normal_5f8cb61b6a4e8.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366371/normal_5f8b4dd781822.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4372074/normal_5f8abd95f2141.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://uploads.strikinglycdn.com/files/bbf9b3ba-760d-45b9-9dd6-feef32c2cd44/48364312927.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/a4cad049-ba0b-4e98-8dfd-40da57eb160b/74617037316.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/0ff88908-39cd-455b-a803-c531c5000005/security_plus_professor_messer.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/8ce572db-91dc-4b34-8f4e-594b7f131e80/endless_space_2_cheat_engine.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0498/9331/0631/files/pacman_download_for_android.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0440/6080/3237/files/lekifukixowimopigab.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/3318/8762/files/national_appraisal_guide_for_mobile_homes.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0496/7035/7149/files/deterministic_network_enhancer_windows_7.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0488/0672/3749/files/psychodynamic_theory_definition.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0266/9586/0403/files/do_bramblestar_and_squirrelflight_have_kits.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0497/9150/0449/files/ooze_vape_pen_manual.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/5800/3096/files/74364229460.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0480/6964/0356/files/english_to_somali_vocabulary.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/8b248994-ba51-4036-b881-9a60c7239156/56963985362.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/f11436b3-efbf-4708-8dc5-deb4281a8f42/wasikilokowaw.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/66629893-b8b2-4e08-94e2-1686c13db210/bogatopitobufof.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_off000052ac.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x52AC 5264 bytes
SHA-256: ecd32b0f4a0b0230eabeae75d21efa61cc5dac023d44d567307dbb44e9681468
font_01_sfnt_off0000649d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x649D 10348 bytes
SHA-256: bbeadf1360ed522e300bb70942134604a9209cb24872ca366eefc2aa342bead5

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