Malicious PDF — malware analysis report

Static analysis result for SHA-256 0bdb4455142cbc1a…

MALICIOUS

PDF

68.0 KB Created: 2020-12-01 12:50:22 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: befef0d778f69f6ff1a1baa858b26ff6 SHA-1: 30fd890076c0ae8f5c26f9286d03bca87800d855 SHA-256: 0bdb4455142cbc1afe87e409c0efe9d13006c96afa6c662b9e09487e26c264e5
214 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF contains a large number of embedded links, with several pointing to known malicious redirectors and link farms. The ClamAV detection and ML classifier strongly indicate malicious intent, likely for phishing or distributing further malware. Although no scripts were explicitly extracted, the PDF structure and embedded links suggest an attempt to redirect the user to malicious content.

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/123?utm_term=pub+table+height+office+chair
    • https://firedisivimi.weebly.com/uploads/1/3/0/9/130969818/9594397.pdf
    • https://fobuxowomi.weebly.com/uploads/1/3/4/2/134235628/6656012.pdf
    • https://luzoxunijasuw.weebly.com/uploads/1/3/4/3/134338954/kuvexatemumutaw.pdf
    • https://mimasalidapu.weebly.com/uploads/1/3/4/4/134466186/c40ecd0ff.pdf
    • https://bubawupuga.weebly.com/uploads/1/3/4/3/134380130/5916cb9d.pdf
    • https://mepaxekedin.weebly.com/uploads/1/3/4/5/134514716/647fa4.pdf
    • https://loxuvozuru.weebly.com/uploads/1/3/4/7/134728716/8312858.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://s3.amazonaws.com/taturi/34753921249.pdf
    • https://uploads.strikinglycdn.com/files/a3de9130-c89c-44d8-9ce4-a4f7cb7f9834/watogexijopunaraxexuvire.pdf
    • https://uploads.strikinglycdn.com/files/2db670b2-f18a-4ed9-a977-e289de337604/ford_tractor_manuals.pdf
    • https://s3.amazonaws.com/vexosafugunu/healthrider_s500i_treadmill_manual.pdf
    • https://uploads.strikinglycdn.com/files/fb6ef60d-2319-4fda-ac1f-e06588356abe/80160552423.pdf
    • https://s3.amazonaws.com/piwanisaj/mabinogi_synthesis_guide.pdf
    • https://s3.amazonaws.com/nitatotol/nadagel.pdf
    • https://uploads.strikinglycdn.com/files/a8e35e3c-d7d7-4270-9062-60b1c99a51ab/navedtra_14139_assignment_6_answers.pdf
    • https://uploads.strikinglycdn.com/files/8ddd3ae6-1dbe-4ffd-9e1c-0d0473ba052a/calligraphy_alphabets_capital_and_sm.pdf
    • https://s3.amazonaws.com/jinotugiwomo/8294718239.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_off0000cc91.bin
b6893d45a1457f4421cf551dd42e018b130e74dc56239a02b77a2214a008aa7a		 pdf-font-stream PDF embedded font (sfnt) at offset 0xCC91 5108 bytes
font_01_sfnt_off0000ddf2.bin
c431ea10ea223a4ebe202828e732448fc28646f5d104c9086bcfa1daa6b3dac0		 pdf-font-stream PDF embedded font (sfnt) at offset 0xDDF2 10576 bytes

Open this report in the interactive analyzer, or submit your own file for analysis.