Malicious PDF — malware analysis report

Static analysis result for SHA-256 e8517106357a57bf…

MALICIOUS

PDF

50.8 KB Created: 2020-11-06 13:41:37 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-04
MD5: 814aa16c9d6212d9bc377409a484801a SHA-1: d6533073bd7b5e5c579295ef82e744aa769e9159 SHA-256: e8517106357a57bff9933565a5b6208c464006f96cde100fec62c8c1ed6490b8
96 Risk Score
Tags
free-cdn-ebook-manual-lure

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 embeds a large number of external links characteristic of an SEO link farm. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 4

  • 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.
  • External URI info PDF_URI
    PDF contains an external URL action
  • 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://trafffi.ru/123?keyword=crisis+theory+moos+1982 PDF link annotation
    • https://gutilutaxare.weebly.com/uploads/1/3/4/3/134333879/8c688e7e.pdfIn PDF document text
    • https://sazaxadapu.weebly.com/uploads/1/3/4/3/134330736/2157355.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4421970/normal_5fa51de336675.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4409840/normal_5f96d42a1c1ed.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/accef6bd-fbc5-48dc-9532-c5cb6d7c846d/ponopadodurarep.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/00425ef7-e92a-422e-8d15-a0409590217a/gagobomiwi.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/f203c5bd-1c9e-45b1-b2a6-e3adf2240013/57301727567.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/5ad4a661-11f4-4e3a-b935-f11c1b0d1459/duzixewelipuzofasididane.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/ba684bac-67c4-49a3-bc37-f39e49905669/wivifupokelaj.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/9a63b981-5b67-4808-909f-3d5d4074d025/45602726846.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/aa124803-6f81-4189-a981-d131281b5ca8/zeforugu.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/d0beb85d-d7ae-4b0e-9739-2aad62459a59/xidaladuwuxuzobixiz.pdfIn PDF document text
    • https://s3.amazonaws.com/henghuili-files2/relationship_awareness_theory.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/a28ca4b2-80cd-4c02-ac44-6e82a0cbc406/nefudebu.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/27d5b3ce-19de-4215-815b-e9f0094e0701/zofuriloguti.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

Related samples 8

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00008961.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8961 5224 bytes
SHA-256: d4de1b5d24a0beaf0b1315e5c6bb48a4840afdb8820a0548616bb372a2c4cfe8
font_01_sfnt_off00009b08.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x9B08 10504 bytes
SHA-256: 61ecca48738bb19445398880da28caaf10749e2b07406055b76493b004aefd4d

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