Malicious PDF — malware analysis report

Static analysis result for SHA-256 e4354d91f4eaf0de…

MALICIOUS

PDF

54.8 KB Created: 2020-10-05 10:42:34 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-17
MD5: 23f1a58558edf62b9ff5480c0ff5ce03 SHA-1: ffc0c9e293f340c2b0468a13be1ae851c4cd056a SHA-256: e4354d91f4eaf0de39e592769b110e8e9c4c7bfa368385d220f2e352cc202e1c
184 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.
  • Small PDF is a non-clustered link farm on disposable hosting medium PDF_SEO_DISPOSABLE_LINK_FARM
    Small PDF contains many clickable external PDF links spread thin across many distinct hosts (no single dominant host), corroborated by a utm_term SEO-redirector link and/or links parked on free/disposable content hosts. This is the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains, rather than a normal document citation pattern. The PDF itself carries no exploit — the risk is the linked destinations.
  • 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=short+stories+with+worksheets+for+high+school In PDF document text
    • http://files.inspirational-quotes-about-life.net/uploads/1/3/1/6/131607063/3786536.pdfIn PDF document text
    • http://files.jacquihewlett.com/uploads/1/3/1/4/131406444/besuvaj.pdfIn PDF document text
    • http://files.vonderhauswulfgermanshepherd.com/uploads/1/3/0/8/130813797/fivepeno.pdfIn PDF document text
    • http://jepesu.saaea.org/uploads/1/3/0/8/130814935/naroda-gizoteko-garobej-gebefaduwojo.pdfIn PDF document text
    • http://files.newportpaddleventnor.com/uploads/1/3/1/3/131379054/walelimesu.pdfIn PDF document text
    • http://files.sstrainingsolutions.com/uploads/1/3/2/6/132681448/nugipo.pdfIn PDF document text
    • http://files.dimitrisaidonis.com/uploads/1/3/1/8/131856402/fosewogebijoner.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://uploads.strikinglycdn.com/files/b3fffa7c-52b1-4025-a8c4-367893705e5c/jagenurija.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/a94290f8-619c-48ff-88bb-42ccd310d4b4/19457433824.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/dcd6135f-32c9-420b-b298-f2592dde18d8/66242627467.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/d546ce46-fdf4-4521-a3c1-e0e6ea6d582b/79521010436.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0498/8105/5390/files/in_the_figure_above_what_is_the_length_of_nq.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0477/3042/6012/files/wanetikededapowitazen.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0481/4798/8631/files/99202512671.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/1275/8426/files/xumikesijuki.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0484/8304/1430/files/composite_grade_board.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

Related samples 8

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

Full JSON: related samples API

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00008b2a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8B2A 4876 bytes
SHA-256: 65d0a8c26a97a36681f41718bee5d5159ab45cec877f09ad48ec8486babc109a
font_01_sfnt_off00009bea.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x9BEA 10368 bytes
SHA-256: e0862f120242dfd2d264ffa365a4013a0e3609b09f7736fb050fc780faab43c0
font_02_sfnt_off0000bf49.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xBF49 4324 bytes
SHA-256: b50a2106bf82917db0cd3cf88f63c5e8cc3298b343ace5cffc591b35df33d24c

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