Malicious PDF — malware analysis report

Static analysis result for SHA-256 1104cb642f83b9d9…

MALICIOUS

PDF

44.3 KB Created: 2020-10-26 02:35:25 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-14
MD5: 7e292940595b390a344058eb9ba190e4 SHA-1: e7f79e3c8552fd16833b31e8a11eaeda74af957e SHA-256: 1104cb642f83b9d98bb22031aa1f6740012c073074288e229ff126b8ab65e6b6
184 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript T1203 Exploitation for Client Execution

The PDF file contains numerous links to external websites, masquerading as a Dungeons and Dragons guide. The heuristic PDF_MALICIOUS_REDIRECTOR_LINK indicates that one of the primary links leads to known malicious redirector infrastructure. The ML classifier also strongly flagged this PDF as malicious. The document body, though heavily obfuscated, contains a URL that appears to be the main lure.

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/strik?keyword=dungeons+and+dragons+5th+edition+volo%252527s+guide+to+monsters+pdf In PDF document text
    • https://wuwuleli.weebly.com/uploads/1/3/1/3/131398564/venabuviwarafoda.pdfIn PDF document text
    • https://julefezi.weebly.com/uploads/1/3/4/1/134131413/tigalopomilivo.pdfIn PDF document text
    • https://jamuseramomuf.weebly.com/uploads/1/3/1/8/131871426/8997904d1d1210.pdfIn PDF document text
    • https://moxitasa.weebly.com/uploads/1/3/1/4/131454719/jorapimara-bekule.pdfIn PDF document text
    • https://zoxetojasag.weebly.com/uploads/1/3/1/4/131437223/d6a00.pdfIn PDF document text
    • https://gimejexoxixaza.weebly.com/uploads/1/3/1/8/131872185/monirafulowafix.pdfIn PDF document text
    • https://diminulagiv.weebly.com/uploads/1/3/4/4/134489960/5cbea5d85.pdfIn PDF document text
    • https://pefopurez.weebly.com/uploads/1/3/4/3/134375846/9735605.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/3b937f53-51af-47eb-ac57-09919d99cfe5/27718833949.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/a19d78f3-5f9d-4e9c-b34a-fe61f048a1c3/fipesutukovajikigarisuv.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/2727b8a1-b26d-4166-8cf2-3587d88ccaee/22948384268.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/035be77d-4e3a-429b-89d7-6cdda0027a04/16445142092.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/4e567607-ef19-4c0e-b5eb-d559c4b28c65/hepsini_vur_sevime_sahnesi.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0438/5662/5829/files/sovibemidezefivolivesunu.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0481/5378/8569/files/home_bathroom_cleaning_checklist.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0502/8898/4222/files/ge_vivid_7_pro_manual.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0486/6424/8470/files/forces_in_equilibrium_grade_11.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0440/5254/5701/files/93471950038.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 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00006954.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6954 5672 bytes
SHA-256: 8f9faafa3eb39304493059d95636eae9b780b246b6f37adb93e6eaa24b4db267
font_01_sfnt_off00007c98.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7C98 11452 bytes
SHA-256: 188d8b1fb746a85c076fe3568ad6ebb54fd0648f65f4dcc50265ad6a626fb92e