Malicious PDF — malware analysis report

Static analysis result for SHA-256 fed113f2d0a52358…

MALICIOUS

PDF

65.4 KB Created: 2020-11-10 20:09:05 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-02
MD5: b9881e722f20f14616d0e947f0769e20 SHA-1: da69f5fcd4b2a02737912a878a0f4c6d48017363 SHA-256: fed113f2d0a52358441fc9503d756a8d74f2665a02b385be26fff3375a2c742f
156 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 ClamAV and 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 0.9997

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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://traffine.ru/strik?keyword=tupac+juice+quotes PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4369782/normal_5f8ff62c6c316.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4411931/normal_5fa9e31b43a2c.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4369329/normal_5f91e5331136f.pdfIn PDF document text
    • https://zanobuxukopul.weebly.com/uploads/1/3/4/6/134678616/lebilat-jotisereju.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4375357/normal_5f8be592d4a17.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4419847/normal_5f9c9a6dd46e2.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4393029/normal_5f941f5d1e349.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4443608/normal_5f9d08f478141.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4393016/normal_5f9993ae76bb3.pdfIn PDF document text
    • https://fekanefitogi.weebly.com/uploads/1/3/4/3/134340372/tidejuge-lazoxevil-kevuwu-mebebibadufogig.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4426814/normal_5f9ecf51ca6af.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://s3.amazonaws.com/jipowumat/92043795467.pdfIn PDF document text
    • https://s3.amazonaws.com/vavabi/wimipave.pdfIn PDF document text
    • https://s3.amazonaws.com/pujirageg/mamma_mia_2_parents_guide.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_off0000b529.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB529 4728 bytes
SHA-256: 181afbbd6c70e265d82c8ea82e5b35f9e4358220d620f0300bc7df7b7ccad0ba
font_01_sfnt_off0000c54b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC54B 10876 bytes
SHA-256: d382ba28dcfa0d8d6fe2abe05ccba7d299e57dac3b4b615346e0c9944855eed1
font_02_sfnt_off0000ea59.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEA59 4324 bytes
SHA-256: 1158d95dac44631f497756703988ba3645251422e7ff0015d3fca430225e7c3e

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