Malicious PDF — malware analysis report

Static analysis result for SHA-256 de3a50ab55bec8e7…

MALICIOUS

PDF

46.2 KB Created: 2020-10-17 19:59:01 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-15
MD5: 387b7bfea3e928de8548d06ceb3237bd SHA-1: 6c663eafcdf44c9afda07c1dab73baec099c8339 SHA-256: de3a50ab55bec8e79c159258b0d8d98d33b8dbb4aa1f534852ffcc6659243172
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/123?keyword=integrals+class+12+ncert+pdf In PDF document text
    • https://cdn-cms.f-static.net/uploads/4366331/normal_5f892f51ca8d6.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366652/normal_5f87708c80f43.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4367013/normal_5f8afa5b346ae.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4365660/normal_5f8a7324f0438.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4369142/normal_5f89a161bb785.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4365601/normal_5f874f2e2ab6a.pdfIn PDF document text
    • https://dujopoda.weebly.com/uploads/1/3/0/7/130739119/5116712.pdfIn PDF document text
    • https://goduvozimaku.weebly.com/uploads/1/3/1/3/131380582/07de6afbe.pdfIn PDF document text
    • https://vewutaniwem.weebly.com/uploads/1/3/0/8/130873717/090489.pdfIn PDF document text
    • https://ziripovopibew.weebly.com/uploads/1/3/0/8/130874468/weloza-menewopi-foposiv-pepez.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/b7d4c39b-1e06-4ea7-b4b1-b8261eb6f0cc/50357696422.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/9d93e099-8d1a-4190-be1b-3920fb37f5f8/temazogekujaratepitaru.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/6890aac5-d7cb-4833-99b1-1cf00e8f4d91/zekozukixikabixizibov.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/8188/2013/files/8335303971.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0484/0878/9150/files/reponaxosarelizitog.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/7831/0295/files/thats_not_my_name_just_dance.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0483/9689/4357/files/ttpod_music_player_apk_download.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0491/6192/8903/files/fallout_shelter_hack_apk_2020_android.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/88f435d7-4e3b-48ea-ac6f-b001ceea520e/jikizifepuzatuvola.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/71fea480-1d2a-4982-bc74-5f04bb8e5769/92628267849.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/0ad889c7-1bb5-468f-87fa-5317963b0c68/39009863959.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/829a04f7-bacc-4ab4-b694-39e8e07693a8/loxatelanowuw.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/2b450263-3d32-49cf-87e3-9efb54e653e3/jawumitugani.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_off000074b9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x74B9 5444 bytes
SHA-256: 976efcd24dd089e17cb81727fb884a99ad569e8f2a423a2a45c2c05edaa32c37
font_01_sfnt_off0000874e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x874E 10416 bytes
SHA-256: e40cb6d378b90e06426645c18814d2b459834203632a27a4f3a54522d120e75a

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