Malicious PDF — malware analysis report

Static analysis result for SHA-256 483426713cde2c0d…

MALICIOUS

PDF

65.8 KB Created: 2020-12-15 21:36:16 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-11
MD5: 523e1825cd1caa426634db2bbe3a284e SHA-1: 183dd57dd3500275d78cac197672c7b4e7e87716 SHA-256: 483426713cde2c0d9661d9f02e15718e112fb4be11c8e1421b97ed4c46c4e769
214 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript T1203 Exploitation for Client Execution

The PDF contains numerous embedded links, with one specifically pointing to known malicious redirector infrastructure. The heuristic 'PDF_SEO_LINK_FARM' indicates a large number of external PDF links, suggesting an attempt to manipulate search engine results or distribute malicious content. The ML classifier and ClamAV detection strongly indicate malicious intent, likely related to phishing or malware distribution.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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
  • 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.
  • 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://traffmen.ru/123?utm_term=scalebreaker+release+date In PDF document text
    • https://nupejaxisolerez.weebly.com/uploads/1/3/4/3/134348845/d71b0ab8877f.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4368756/normal_5f9d602a89a13.pdfIn PDF document text
    • https://nubojubixuxo.weebly.com/uploads/1/3/1/4/131410311/3a8cf4f06c2c4df.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366003/normal_5f870bbcd4a6a.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4381740/normal_5f91bf0d97005.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4366381/normal_5fcfa21ad47e2.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4466154/normal_5fd0927ec5a47.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/fefurorobumi/gudafanotux.pdfIn PDF document text
    • https://s3.amazonaws.com/digigitusuduk/gurevelolosalorawusiko.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/73b0e8fb-250f-475b-bb97-c1730ebaaf63/how_to_imprint_ark.pdfIn PDF document text
    • https://s3.amazonaws.com/wejuvono/object_of_prepositional_phrase.pdfIn PDF document text
    • https://s3.amazonaws.com/xalasawu/ceropegia_stapeliiformis_ssp_serpentina.pdfIn PDF document text
    • https://s3.amazonaws.com/wikurixobelu/rpg_maker_xp_android_apk.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_off0000c407.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC407 5240 bytes
SHA-256: f6f402a0ac93cd5f36b63c14e746c7e21ddb08e10b93fd87bb1bc08e0f678043
font_01_sfnt_off0000d5e1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD5E1 10716 bytes
SHA-256: afa385fd666142155b02ada383f4c76c46f47c957a48743925c07ebbaeb77185

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