Malicious PDF — malware analysis report

Static analysis result for SHA-256 2b425e0c9abbacdb…

MALICIOUS

PDF

30.1 KB Created: 2020-11-05 23:20:14 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-12
MD5: 80230bc139a0b2348debbcff37501e8b SHA-1: ea81f912a5913f9c0fd60d7d7fab93f70910da28 SHA-256: 2b425e0c9abbacdb64be2481fb6655278ef63f924040d9cfc0abffcba34ee48f
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF document contains a large number of embedded links, many of which point to known malicious redirector infrastructure or link farms. The document body, though obfuscated, contains references to "Apk market app" and URLs, suggesting a lure to download potentially malicious applications or visit further compromised sites. The ML classifier strongly indicated maliciousness, and the presence of multiple redirector links confirms a malicious intent to direct users to harmful content.

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/123?keyword=apk+market+app In PDF document text
    • https://xawuwotogot.weebly.com/uploads/1/3/2/6/132695388/2111198.pdfIn PDF document text
    • https://moguvikob.weebly.com/uploads/1/3/0/8/130874292/vuxubofowa.pdfIn PDF document text
    • https://salofapaj.weebly.com/uploads/1/3/4/3/134314320/gefesu.pdfIn PDF document text
    • https://zatafepe.weebly.com/uploads/1/3/4/0/134000007/8262813.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4414864/normal_5f9cb26d5f399.pdfIn PDF document text
    • https://vuwuvaxurig.weebly.com/uploads/1/3/4/6/134649086/5658734.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4390381/normal_5f8fdba4c9148.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4458132/normal_5fa33724c0a12.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/f7e1e838-a72f-44fa-97b3-49c1b2705022/68971434976.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/7247901a-fcd9-45cd-a232-dcbd7ce80ed2/60369718012.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/fafecfe4-5174-4f1e-9b36-f04548e63a76/tugaxukilavogusagupisetif.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_off00003cf1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x3CF1 4808 bytes
SHA-256: 20b1510e13462aeb24d9f2a3e2e38925b0f9f5ab60914e12236ccc48c8bb36ac
font_01_sfnt_off00004d32.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x4D32 9152 bytes
SHA-256: d005ca224a0f15a8aaa7b03f3d9da7f25db71e4d5b5c689adf4ce3f05aa2507f

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