Malicious PDF — malware analysis report

Static analysis result for SHA-256 e32898c984a21ec2…

MALICIOUS

PDF

63.6 KB Created: 2020-12-14 03:41:36 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 8d9a644259adf2e186cd0c7416754d90 SHA-1: 15fbf56a00c6a230724f416ee717844bcdf54797 SHA-256: e32898c984a21ec2b0522275b60f4af90abea2cc2f3c0d128c1d59a89ded4184
214 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

The sample is a PDF file identified as malicious by multiple heuristics and a machine learning classifier. It contains a significant number of embedded URLs, with at least one pointing to a known malicious redirector and another to a link farm. This suggests the document is designed to lure victims to malicious websites, likely for phishing or malware distribution.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 5

  • PDF links to known malicious redirector infrastructure critical PDF_MALICIOUS_REDIRECTOR_LINK
    PDF contains a clickable URI to redirector infrastructure used by a known malicious PDF SEO/adware delivery campaign. These documents typically rely on user interaction and redirect chains rather than a PDF parser vulnerability.
  • 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.
  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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://gettraff.ru/strik?utm_term=dances+in+ottumwa+iowa
    • https://ludolukek.weebly.com/uploads/1/3/4/6/134699908/3842356.pdf
    • https://cdn-cms.f-static.net/uploads/4385617/normal_5fb4fbf0dc7c7.pdf
    • https://cdn-cms.f-static.net/uploads/4387709/normal_5fc14476ac3ec.pdf
    • https://femadupimasimu.weebly.com/uploads/1/3/4/5/134594559/8120617.pdf
    • https://ravidaxixow.weebly.com/uploads/1/3/4/3/134315840/gikisaf_zaxevidapa_zilixi_rivujinuvo.pdf
    • https://cdn-cms.f-static.net/uploads/4406170/normal_5fa51b13abe85.pdf
    • https://cdn-cms.f-static.net/uploads/4492871/normal_5fd33c938f4b6.pdf
    • https://cdn-cms.f-static.net/uploads/4381095/normal_5fad9812cba5b.pdf
    • https://tixanesel.weebly.com/uploads/1/3/4/2/134234664/98ae0c.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://static1.squarespace.com/static/5fbce344be7cfc36344e8aaf/t/5fbdf05a3f75b166439a1eed/1606283358358/head_first_python.pdf
    • https://s3.amazonaws.com/tulosa/27095656721.pdf
    • https://s3.amazonaws.com/dazifozixawus/whatsapp_apk_old_version_2017.pdf
    • https://static1.squarespace.com/static/5fc1a9b80b6b03258f3af046/t/5fc542f418e72e5fdb845af5/1606763252940/41009725075.pdf
    • https://uploads.strikinglycdn.com/files/6330a8e9-855a-4643-b934-a49e911fb7af/power_of_10_worksheets.pdf
    • https://uploads.strikinglycdn.com/files/362aa61a-cc1b-4c8c-a3f8-383f3c4cc77d/pakiwevikitubimox.pdf
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/
    • http://scripts.sil.org/OFL

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000bbca.bin
41b60b0db05dc50c498f592006ad1bff40fe3b5b1cc782d6f54031e72cf46c03		 pdf-font-stream PDF embedded font (sfnt) at offset 0xBBCA 4908 bytes
font_01_sfnt_off0000cc82.bin
cc55be4878552ea03ad566093d9426194ef76a7e8678925bae817f335aa41026		 pdf-font-stream PDF embedded font (sfnt) at offset 0xCC82 10968 bytes

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