Malicious PDF — malware analysis report

Static analysis result for SHA-256 51fb86be92fe8ed0…

MALICIOUS

PDF

49.2 KB Created: 2020-10-31 05:40:58 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-23
MD5: 0b1c06f9b044cd9e55ecff88387ef1fa SHA-1: 9f63f79eed32bf2eb33c8c2bbf403af9a7f70467 SHA-256: 51fb86be92fe8ed047c24f80ced89f391470572b2a161644ec32687ee715169d
184 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

This PDF file contains a large number of embedded links, many of which point to disposable hosting services and redirector infrastructure known to be malicious. The primary URL identified, https://ggtraff.ru/aws?keyword=disgaea+5+wiki, is flagged as a malicious redirector. The document's structure and content indicate it's designed to lure users into clicking these links, likely leading to further malicious downloads or phishing attempts.

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://ggtraff.ru/aws?keyword=disgaea+5+wiki In PDF document text
    • https://rovumixonisi.weebly.com/uploads/1/3/4/0/134012407/zonosikorafifogagik.pdfIn PDF document text
    • https://lajawenofuki.weebly.com/uploads/1/3/4/5/134501859/2548df2bc6.pdfIn PDF document text
    • https://turomanusogagi.weebly.com/uploads/1/3/1/4/131453559/4663036.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4392871/normal_5f90db85a0a65.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4380682/normal_5f966f7ddc618.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366015/normal_5f9250aa0000c.pdfIn PDF document text
    • https://daletutanedura.weebly.com/uploads/1/3/1/6/131636587/jogaki-nanasumabirapi-wapezuz-tulujawegagokif.pdfIn PDF document text
    • https://refaxezadale.weebly.com/uploads/1/3/4/3/134325555/e95e224c8f2d.pdfIn PDF document text
    • https://warakamaluxib.weebly.com/uploads/1/3/4/3/134378328/3905118.pdfIn PDF document text
    • https://kigefewapese.weebly.com/uploads/1/3/4/5/134528385/4903a4a01e65d5.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4377704/normal_5f936d11d202e.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4380086/normal_5f8e9b8facf17.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/bubodeliza/mole_to_mole_ratio_questions.pdfIn PDF document text
    • https://s3.amazonaws.com/sajatesawodiji/human_psychology_hindi.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0504/8526/4575/files/how_do_i_fix_fastboot_mode_waiting_for_device.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_off000072cb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x72CB 3864 bytes
SHA-256: c59a43a33f95eecde967827c0f1473bfb9288e392b3283c03f11e89570ad9210
font_01_sfnt_off0000805b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x805B 5004 bytes
SHA-256: 091185c825128c332ff0de1c260e64273d32f51e2e6479f317e77c33bd28b339
font_02_sfnt_off0000919d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x919D 11152 bytes
SHA-256: 90a0431e8fc77af8cc7b8cba4a8b9f19d943a5f064eb99bd1f71d36bc18cc5f7

Open this report in the interactive analyzer, or submit your own file for analysis.