Malicious PDF — malware analysis report

Static analysis result for SHA-256 5fe8857555527c9a…

MALICIOUS

PDF

35.7 KB Created: 2020-11-06 01:50:41 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-01-15
MD5: d81a1949d70c201bc3146b05166107d2 SHA-1: f276a4aa9a49e9b54768bb010ffd2dfd49ca20ef SHA-256: 5fe8857555527c9a0661e6efef0325b4242176dec4866c3f45c827d3e53b8650
126 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 5

  • 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.
  • Small PDF is a non-clustered link farm on disposable hosting medium PDF_SEO_DISPOSABLE_LINK_FARM
    Small PDF contains many clickable external PDF links spread thin across many distinct hosts (no single dominant host), corroborated by a utm_term SEO-redirector link and/or links parked on free/disposable content hosts. This is the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains, rather than a normal document citation pattern. The PDF itself carries no exploit — the risk is the linked destinations.
  • 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://traffset.ru/aws?keyword=free+spotify+premium+code+generator PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4392861/normal_5f912b93e03b6.pdfIn PDF document text
    • https://sanuvexugivi.weebly.com/uploads/1/3/1/6/131606490/4612651.pdfIn PDF document text
    • https://jakemujilofadam.weebly.com/uploads/1/3/1/3/131380171/xesivolebuvarilusewo.pdfIn PDF document text
    • https://jamuseramomuf.weebly.com/uploads/1/3/1/8/131871426/rowewu.pdfIn PDF document text
    • https://nobinetezo.weebly.com/uploads/1/3/0/9/130969761/1644552.pdfIn PDF document text
    • https://fisofomopix.weebly.com/uploads/1/3/4/6/134603918/wepif.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4420597/normal_5f9e1cf07c2f9.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4379034/normal_5f90482ddb575.pdfIn PDF document text
    • https://varivupe.weebly.com/uploads/1/3/4/4/134480773/3409ce93d.pdfIn PDF document text
    • https://keniwuki.weebly.com/uploads/1/3/1/4/131483234/bf4458.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • https://uploads.strikinglycdn.com/files/d2067098-202d-462b-a5a4-14b5ee2795c8/64111239065.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/b1dbcd30-b360-473f-a633-58e9a58e7dd3/35506043702.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000405d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x405D 5380 bytes
SHA-256: 7c246fd85353169693a0776be6a8d4fabc00c993dce47e2fcb0383a5b2357343
font_01_sfnt_off00005298.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5298 9660 bytes
SHA-256: 6f70e59fe160c6d16eacc5f146e623999b57ff1f015b57275104312945d23c64
font_02_sfnt_off00007399.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7399 4324 bytes
SHA-256: 0d0f64e27578eb124b8bc81c7eceacdd166e22eddd95c81328e9fbd7de2a6333

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