Malicious PDF — malware analysis report

Static analysis result for SHA-256 38690970bca5cfef…

MALICIOUS

PDF

48.0 KB Created: 2020-10-31 20:53:56 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-04
MD5: 7c008ac42f472cd9b8ff0d7a2627b13e SHA-1: d853d39d21bdb42b540332aa8256fbc6f7742cee SHA-256: 38690970bca5cfefbe17985f310c9ec18d671ee483b6957914e7a91ab59e3a39
94 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

This PDF document was flagged as malicious by an ML classifier. The file routes users through malicious redirector infrastructure. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 3

  • 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.
  • 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/strik?keyword=samsung+ht-j5500w+reset In PDF document text
    • https://cdn-cms.f-static.net/uploads/4372361/normal_5f8886a65ff43.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4369327/normal_5f9b043b9f67b.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4382189/normal_5f9770ed06852.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4371497/normal_5f8932165973d.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366033/normal_5f87255114a44.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://cdn.shopify.com/s/files/1/0496/4037/4438/files/tyrion_winds_of_winter_chapter.pdfIn PDF document text
    • https://s3.amazonaws.com/vufupu/7708201729.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0268/7362/6810/files/pamupizupag.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0266/8203/2315/files/99887572490.pdfIn PDF document text
    • https://s3.amazonaws.com/memul/container_dimensions_metric.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/4848/4507/files/6605035783.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/4312/7447/files/88397068056.pdfIn PDF document text
    • https://www.samsung.com/us/televisions-home-theater/home-theater/home-theateIn 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_off0000640b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x640B 5636 bytes
SHA-256: d112e78f704d53ca52b5a93fec9059b0af4db076eb1aa4e338e5fa265923d88b
font_01_sfnt_off0000772a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x772A 11816 bytes
SHA-256: bde6bc8d5d4c918ff3ff05a57d12204e6ec1580ec9fd6b82caa5faeaddeb9d0d
font_02_sfnt_off00009d9d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x9D9D 16204 bytes
SHA-256: 532315dfdc59b350d447ad91845dd8cc72a836e684f536ab9a4305dc5b53fb8e