Malicious PDF — malware analysis report

Static analysis result for SHA-256 db4f38348ac6b4b1…

MALICIOUS

PDF

60.2 KB Created: 2020-10-01 10:08:57 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-17
MD5: 4e57cf5fd3bf52e8f60594cd98108fb5 SHA-1: 50893f534c6cba388f071c4e7c902dc923a377e3 SHA-256: db4f38348ac6b4b1ccf562d32ae7c098dc00b959e5c78ead54a1722bdbf6e6fe
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=assam+rifles+recruitment+2017+pdf In PDF document text
    • http://files.nicoleona.com/uploads/1/3/0/7/130739169/fe5710a.pdfIn PDF document text
    • http://bosufu.laceibajournal.org/uploads/1/3/2/8/132814930/30b1d18a40b.pdfIn PDF document text
    • http://files.unccenter.org/uploads/1/3/0/7/130776602/nibevox_rusupuzo_tizomela.pdfIn PDF document text
    • http://files.friendsofhuggins.org/uploads/1/3/1/0/131070581/deperatonoru.pdfIn PDF document text
    • http://votel.namaslaydesigns.com/uploads/1/3/1/8/131856539/jupojutobegi.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://fedorahosted.org/lohitIn PDF document text
    • https://uploads.strikinglycdn.com/files/7154c996-c4de-4e3b-9d9a-ea875bfe013d/5497797752.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/d7931538-5701-4e3a-9bf4-d39416949f5d/zuwajekober.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/09cacb35-f7f3-4aeb-a25c-0b244eeb4bde/gugamadakipifafuredeberak.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/fbfc5628-feb1-4f59-9177-ad6c6889f69c/gidetexusanivow.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/07dc67cc-1e30-4fb3-8adb-bd4f2e17b201/gofotenodibugulovoripufa.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/5a34c945-f6e8-4e87-b16d-c46a1360035d/80336660897.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/f8df46ef-4bd6-4480-b068-53788bf3ee95/ronunegeroruwogibus.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/73b4094f-3ba3-4630-a8f9-353698a9946d/rowusopuwomadimime.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/7673/0533/files/dodos.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/4030/1478/files/panasonic_tes824_programming.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/5396/4712/files/loluxabepamusamuj.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.geocities.com/mitra_anirban/hobbies.htmGNUIn PDF document text
    • http://www.gnu.org/copyleft/gpl.htmRegularIn PDF document text

Related samples 8

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000720e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x720E 5696 bytes
SHA-256: 1e38ed1b125222ff105e78489c0e8206e005e2f1d9fcd730f18ba530b13601b3
font_01_sfnt_off00008562.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8562 3720 bytes
SHA-256: a7c194c348f4bc26aad06ae1fa1eadf76503a3aca856ff80314c3d87a816eea9
font_02_sfnt_off000090c2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x90C2 15948 bytes
SHA-256: b88ded1a5ed8258741f1251ddc4b969f2d819316ce0dc138ab6406f7a2839874
font_03_sfnt_off0000c1c4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC1C4 10480 bytes
SHA-256: 316727bb99cfe1e203516c63aa010317099eb1f8778b3e1a589cdf359cbfc0a3

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