Malicious PDF — malware analysis report

Static analysis result for SHA-256 e28a3cdfb6f50b5f…

MALICIOUS

PDF

66.3 KB Created: 2020-11-24 00:28:42 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-04
MD5: e3bb719ddf73025b809a6c9ad5cdf4c8 SHA-1: d776378c52bc9136a78fbb5aea8ea30bca03458c SHA-256: e28a3cdfb6f50b5fc33de30baea3085549a8065c5bd7c6242d35448f9c38ed23
164 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. It uses an urgency-based lure. 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 0.9998

Heuristics 6

  • 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.
  • Urgency / deadline lure low SE_URGENCY_LURE
    Document contains urgency or deadline language ('account will be terminated', 'action required within 24 hours', etc.) — useful context, but low-signal without other findings
  • 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://trafffe.ru/strik?utm_term=jake+drake+brockman PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4465259/normal_5fb490f6ed96c.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4393625/normal_5f9dfa88b0b86.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4427785/normal_5fa26dc20bac4.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366035/normal_5f9c7cced9bdf.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4365546/normal_5f897d2d250c2.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366407/normal_5f8758651310a.pdfIn PDF document text
    • https://xadaxegaku.weebly.com/uploads/1/3/4/4/134444747/lugij.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4414169/normal_5f993c3344dec.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/651c8525-c8e1-45bf-ad05-ec14fbf0953a/97552745211.pdfIn PDF document text
    • https://s3.amazonaws.com/pesetufavo/luwutijiwu.pdfIn PDF document text
    • https://s3.amazonaws.com/degisapemifa/zojesitelinime.pdfIn PDF document text
    • https://s3.amazonaws.com/remuv/babulal_chaturvedi_calendar_2018_download.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/581ceb09-aa3d-42e6-a0ed-956626ebfb72/zeditowezewarinadarojoge.pdfIn PDF document text
    • https://s3.amazonaws.com/fofeguj/battlefield_bad_company_2_android_mali_400.pdfIn PDF document text
    • https://s3.amazonaws.com/wikurixobelu/st_dorothy_church_warren_mi.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 4

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_off0000c6c4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC6C4 5068 bytes
SHA-256: 8279e449bff7767c8ce81d7ad134d04880de6753efc3bb3fb2ebb1671ddecb9f
font_01_sfnt_off0000d7f3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD7F3 10696 bytes
SHA-256: 0ec17649040888e62fa9d5e79bbb9139a0c3ed2603bd156b346aa3e947c4f33f

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