Malicious PDF — malware analysis report

Static analysis result for SHA-256 7282bd676d577e1c…

MALICIOUS

PDF

46.5 KB Created: 2020-10-15 01:50:33 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-15
MD5: dec17c43c4efcdc652c6df1d027337d4 SHA-1: 591812a6b2d4eb651faa585228494f895d9c911b SHA-256: 7282bd676d577e1c60b9645a8fc4f1c7217eeb83dc579c9520ebae03cf45c69e
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://gettraff.ru/123?keyword=akshar+general+knowledge+book+2020+pdf In PDF document text
    • https://site-1038789.mozfiles.com/files/1038789/43728615699.pdfIn PDF document text
    • https://site-1039649.mozfiles.com/files/1039649/stream_and_play_pc_games_on_android.pdfIn PDF document text
    • https://site-1041864.mozfiles.com/files/1041864/jexoveguxomalabazatunogim.pdfIn PDF document text
    • https://site-1040574.mozfiles.com/files/1040574/jarip.pdfIn PDF document text
    • https://tekegalesi.weebly.com/uploads/1/3/0/7/130740489/zaxekiviwibige.pdfIn PDF document text
    • https://jaserasozupog.weebly.com/uploads/1/3/1/4/131454215/431967b989f5.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366666/normal_5f87695799e6c.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366662/normal_5f87760718c21.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366063/normal_5f8775167c325.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4365612/normal_5f877d2668427.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366359/normal_5f877872de557.pdfIn PDF document text
    • https://site-1038765.mozfiles.com/files/1038765/14657626702.pdfIn PDF document text
    • https://site-1043458.mozfiles.com/files/1043458/tisipubogetajafuzofepoxe.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/0a1d6186-5ef5-4203-8296-49f530dccd9d/narepabijepig.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0463/6629/4171/files/68111295993.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/0371/5489/files/bajepaposuriderafevuten.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0483/6094/7861/files/liwelobudulumupe.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://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000608a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x608A 5864 bytes
SHA-256: 7890eb8f790e42dedeb9bd0536510b93bd27ff3f0d561e4af7bf07d1ed04ef41
font_01_sfnt_off0000747e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x747E 10300 bytes
SHA-256: e97601fc84023ada5996593aac180c3c77ffcec2f606c18c0c7a883bf86fb0b1
font_02_sfnt_off0000977a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x977A 16164 bytes
SHA-256: c41fc46809d2260d2d1a821cef6bb00dae560fdbad380da94a93f29d012df54e

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