Malicious PDF — malware analysis report

Static analysis result for SHA-256 f61dfc569c25dd2c…

MALICIOUS

PDF

41.6 KB Created: 2020-10-25 21:22:35 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-10
MD5: effb52501aa0b819856ad7e9d1282b35 SHA-1: 90f32d4a5a594466259594528a300cc110461c62 SHA-256: f61dfc569c25dd2c1d38e3be367f27c0b7d974ee4eef0c045f21edf1843c8012
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/aws?keyword=alto+sax+sheet+music+for+beginners+pdf In PDF document text
    • https://cdn-cms.f-static.net/uploads/4365547/normal_5f88b1777c61c.pdfIn PDF document text
    • https://mabanopovofed.weebly.com/uploads/1/3/1/4/131453130/vidabudivodeduwokobu.pdfIn PDF document text
    • https://jakedekokobara.weebly.com/uploads/1/3/1/3/131381480/nimemoroligamaj-tafixidupara.pdfIn PDF document text
    • https://pasugewu.weebly.com/uploads/1/3/1/0/131071180/fuxegosimipu.pdfIn PDF document text
    • https://kuvejepi.weebly.com/uploads/1/3/4/4/134452054/kujoz_pofekopazalegas_rujuvovunen_tudedi.pdfIn PDF document text
    • https://tamagokevalagir.weebly.com/uploads/1/3/0/7/130776783/6152118.pdfIn PDF document text
    • https://sibakixode.weebly.com/uploads/1/3/2/8/132814768/dalorakono_jawedesalet_nekobagedi_mubutusiki.pdfIn PDF document text
    • https://megadezatesaram.weebly.com/uploads/1/3/0/7/130776649/77959.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • https://s3.amazonaws.com/subud/jofusimekusesobomokut.pdfIn PDF document text
    • https://s3.amazonaws.com/xanebavifamopez/42738799786.pdfIn PDF document text
    • https://s3.amazonaws.com/dedinavesute/sesawemo.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0266/7783/8015/files/52519996797.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0488/2844/8933/files/ap_world_history_test_1_study_guide.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0492/5616/9628/files/kanoripegu.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0504/5721/5166/files/jowenujepipu.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0499/1218/5000/files/fomexekabilapediz.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0499/8260/3415/files/779043030.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/5962/6655/files/basic_8_trig_identities_worksheet.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0499/3826/8318/files/play_store_download_apk_for_jio_phone.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000055c7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x55C7 5648 bytes
SHA-256: fded4b2351833fb58381f3b352c2b8f6588a0f46be4a3b8831c215fc583df95e
font_01_sfnt_off000068d0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x68D0 9980 bytes
SHA-256: b45d9ea2c04c367541cdf77d9cdabc3ec4e62735a5afdd80893b6f32724429cb
font_02_sfnt_off00008b19.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8B19 4324 bytes
SHA-256: 9f355172d696dda274cac500966718f112ce76951f19577ac4888987ea6471b2

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