Malicious PDF — malware analysis report

Static analysis result for SHA-256 6ebf5b576d5070e9…

MALICIOUS

PDF

75.9 KB Created: 2020-11-25 20:57:36 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-27
MD5: aedc5927a437a57321e46dca07fae4bc SHA-1: d6f5284739cac92fdeffd1e4300f217d71ea5a82 SHA-256: 6ebf5b576d5070e9cd7144fbfc30dae31c420f0bbc367f20b7b26808c4c8a7be
244 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file was flagged by multiple heuristics and a machine learning classifier as malicious, with ClamAV identifying it as Pdf.Phishing.Trojan. The file contains a large number of embedded links, many pointing to disposable hosting services and redirector infrastructure, indicating a link farm designed to distribute malicious content or conduct phishing. The primary malicious URL identified is https://traffking.ru/strik.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9999

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
  • 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.
  • 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.
  • 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://traffking.ru/strik?utm_term=southside+high+school+youngsville+la+uniforms In PDF document text
    • https://dosabaret.weebly.com/uploads/1/3/4/8/134861273/618d5.pdfIn PDF document text
    • https://burevojaziji.weebly.com/uploads/1/3/4/7/134729690/bikidal.pdfIn PDF document text
    • https://pilovezodono.weebly.com/uploads/1/3/4/3/134313857/losewatuwuzasu.pdfIn PDF document text
    • https://totamozosapopa.weebly.com/uploads/1/3/4/7/134712517/7314942.pdfIn PDF document text
    • https://numuzobiw.weebly.com/uploads/1/3/4/5/134589566/8397156.pdfIn PDF document text
    • https://pavowojavujide.weebly.com/uploads/1/3/1/3/131398322/6403867.pdfIn PDF document text
    • https://kowabimope.weebly.com/uploads/1/3/4/3/134359524/rivupujisi.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4380890/normal_5f9ddce3f2f97.pdfIn PDF document text
    • https://xeforosoxipu.weebly.com/uploads/1/3/4/9/134900432/26609f4f45.pdfIn PDF document text
    • https://xidoxuzi.weebly.com/uploads/1/3/4/7/134707988/77ea68489.pdfIn PDF document text
    • https://vajizekof.weebly.com/uploads/1/3/4/5/134594154/xeloradudave.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4381756/normal_5fb8304b944ca.pdfIn PDF document text
    • https://pujuferot.weebly.com/uploads/1/3/4/6/134657525/6309584.pdfIn PDF document text
    • https://joguputip.weebly.com/uploads/1/3/4/6/134681535/5567556f0a4afbf.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/paropabaru/garth_brooks_video_boise_idaho.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/56cb096d-2d1f-44b7-8db3-7e2cfbad0723/advanced_word_family_lists.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_off0000e7c1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE7C1 5700 bytes
SHA-256: 67c750a6ba8ef0b3c0b007e7accadee9efe7edffb6b85528a1e5c1bc789c186f
font_01_sfnt_off0000fb17.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFB17 11072 bytes
SHA-256: 48d2f731a842c707e978d5733fcefb65a4ce52aa475159a862433670fab0d9ce

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