Malicious PDF — malware analysis report

Static analysis result for SHA-256 047dd720d27fadad…

MALICIOUS

PDF

37.0 KB Created: 2020-11-06 15:50:08 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-04
MD5: 68e14c2ad1917e736f8c96812464d2d6 SHA-1: 5354d178cc43fef18c2110bd4922a67396eed7c0 SHA-256: 047dd720d27fadadf18a6ac988e69eab1c447ad3d3713548843ed35bcb36988f
66 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 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://trafficel.ru/123?keyword=android+studio+cannot+install+apk PDF link annotation
    • https://zimiduninu.weebly.com/uploads/1/3/1/6/131637103/3511852.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4381547/normal_5f9278234a98f.pdfIn PDF document text
    • https://veraweno.weebly.com/uploads/1/3/0/7/130739577/lofokakamegifuluso.pdfIn PDF document text
    • https://jamitugila.weebly.com/uploads/1/3/4/0/134012499/7ed963.pdfIn PDF document text
    • https://medizagokitoni.weebly.com/uploads/1/3/2/3/132303310/7162328.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4415756/normal_5f9ef01b52863.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/a8faefb9-fdb3-4dbe-a4bc-bc944f011b5b/babixerupimupufepotuf.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/1a177b1a-083f-487b-8687-a6ec1e1f703a/86944875980.pdfIn PDF document text
    • https://nodexedi.files.wordpress.com/2020/11/zuzejigoki.pdfIn PDF document text
    • https://firijidu.files.wordpress.com/2020/11/pezexa.pdfIn PDF document text
    • https://namuxalapo.files.wordpress.com/2020/11/tikojosegegivazon.pdfIn PDF document text
    • https://zijitirezi.files.wordpress.com/2020/11/tiselegiwulanofivod.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/04e1dba2-675b-493f-a175-1d2c9829cf65/3644176279.pdfIn PDF document text
    • https://zegamidat.files.wordpress.com/2020/11/wererodegirifarore.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_off00004f3c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x4F3C 5120 bytes
SHA-256: 6969590a5f604d3a4a782810ad56e4f5a33793a9365c4d8b92bc58e77201e57b
font_01_sfnt_off000060b8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x60B8 10720 bytes
SHA-256: 3d32f1848f4d2cd2b44b1644e57d2b4ce630d8e99325c17f660ae916470c4855

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