Malicious PDF — malware analysis report

Static analysis result for SHA-256 362b40b7e2ee7718…

MALICIOUS

PDF

43.2 KB Created: 2020-10-04 12:41:06 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-26
MD5: 4694a178af6b0c049e36e012b5f65656 SHA-1: 31f1be942281adce36bfaa69f48d9a30798bccae SHA-256: 362b40b7e2ee77185ecb3ce3778174819aa5f305a2f16234e45790cae72644b6
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains embedded links, one of which points to a known malicious redirector. The document body, though heavily obfuscated, contains text that appears to be a lure related to 'Black Desert Online' and includes the malicious URL. The presence of a link farm further suggests an attempt to drive traffic to malicious sites.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 4

  • 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.
  • 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=black+desert+online+ninja In PDF document text
    • http://files.msjoneslab.com/uploads/1/3/1/3/131380623/jawalimilenejezo.pdfIn PDF document text
    • http://files.thebronxlgbtexpo.com/uploads/1/3/0/8/130873708/lebatana_divesalafopela_biwibu.pdfIn PDF document text
    • http://files.fatcityentertainment.com/uploads/1/3/1/4/131438468/2013716.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/d7a600f7-5ba3-4858-bd81-5a3f246dc847/38968613383.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/f7e936f5-04e1-47b2-bda3-a48bcab5bd2d/56310128767.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/a5dfb193-7e65-4e70-9f74-ad038c64a2ad/mawalelejowabiro.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/224f1120-a3ac-4d05-8f0b-d6bc5e13c3b2/duker.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/3ad4fee0-8e38-465c-8a5d-e7315341d63d/54681693770.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/bb630db1-ba1c-4f37-a2a9-e6285f1ce036/57800883298.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/dbe26db6-3a23-4e91-b79e-5c851ff31a23/42606969509.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/341a54c0-7e46-4144-8bd3-ac1efa74e853/98157862016.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/c9b0395d-2eb8-414a-a7d2-e6639b67d239/10196277370.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/a349ba53-808d-412f-aa1b-563c41148296/zemuvazusapuliju.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/87c36dda-84df-45f7-b03e-841e70796e97/refonut.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_off00006d24.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6D24 5124 bytes
SHA-256: fa61ff36ff4ad19e4723091caea5bb12245e7ab7479348578076f5da15082d4c
font_01_sfnt_off00007e9d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7E9D 9740 bytes
SHA-256: e94b53f5f6b4b6fc19e51a4529fdde7854b99ef635b8efabc7239bfdb31891e2

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