Malicious PDF — malware analysis report

Static analysis result for SHA-256 478248b26b4e5a9e…

MALICIOUS

PDF

49.1 KB Created: 2020-10-25 21:10:55 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-04
MD5: b7929804abb465defa5b1bf36a82a3e4 SHA-1: 298107f70a9d1f1d4d39022cbea1a4bc9aca60e4 SHA-256: 478248b26b4e5a9ef09b965e19d437ea3909b2f5ae99225f161139c6c9f4e0dd
154 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF document was flagged as malicious by an ML classifier. The file embeds a large number of external links characteristic of an SEO link farm and 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 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/aws?keyword=bloqueo+av+de+primer+grado+pdf In PDF document text
    • https://latenenagizogip.weebly.com/uploads/1/3/2/6/132696064/romodo_pojumukozagezi_wezisawobejugaf_vilukoxujokup.pdfIn PDF document text
    • https://sasenepekevob.weebly.com/uploads/1/3/4/2/134266747/borawejut.pdfIn PDF document text
    • https://debemalimuwu.weebly.com/uploads/1/3/4/3/134385929/ba94d2d962411a.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4383300/normal_5f91d2eff2ea9.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4386349/normal_5f95969146bb9.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4368989/normal_5f8c9c589a1b0.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4369499/normal_5f8b848ac3ea9.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4374986/normal_5f89af9203f33.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366351/normal_5f87100808409.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4369508/normal_5f893bc03fad5.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4369781/normal_5f8b68aee4c98.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4369509/normal_5f8b7a21b6854.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4388163/normal_5f935d40c7a4d.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4374840/normal_5f8a9b7048f0d.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.opentle.orgIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/3543/3882/files/finale_2020.5_user_manual.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0439/3874/2440/files/mythica_the_iron_crown_full_movie.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0503/7942/3942/files/79784900737.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/1f918a9d-6feb-404a-ba66-2db2a9e9816e/papikumavipotixazagufoja.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/ec0b8d15-493f-4cc7-aeb9-3a50e1b2b1d7/86767904243.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/65af9da8-cb2a-4ba7-a13b-08b1af34e4f2/jasitabukodobapodotupuj.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/5793466f-6cc4-4f02-85ef-af6674dd0801/kinirevewezigulizu.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
    • http://www.gnu.org/licenses/gpl.htmlIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00006e5d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6E5D 5420 bytes
SHA-256: 61034a093da2bd282711ee68e212d4df1cc9c6dcadc0be9d69c6d9662973c0b7
font_01_sfnt_off000080b1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x80B1 6524 bytes
SHA-256: 1a30ffad343f41ad933d4c6f286a80144b4fd41ad45f1e53be59207a03e8d492
font_02_sfnt_off000091d2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x91D2 10752 bytes
SHA-256: d68874a05277b979f19dc23062522bd438243c949ab9b4324cc445e059ddf25c

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