Malicious PDF — malware analysis report

Static analysis result for SHA-256 07c4156d1aec2cf2…

MALICIOUS

PDF

65.5 KB Created: 2020-11-09 20:22:45 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-03
MD5: e362b769caf0d2062d5d6485d8300ae5 SHA-1: 33c879ccb5e30f4d0c88be9ee438aa5863971064 SHA-256: 07c4156d1aec2cf2c56a65ddeb2fc4529baadc78da1f7a38385c1a63e0e88029
214 Risk Score

Malware Insights

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

The PDF contains a significant number of embedded links, many pointing to potentially malicious redirectors and link farms. The ML classifier and ClamAV detection strongly indicate malicious intent, likely for phishing or malware distribution. No scripts were extracted, but the structure suggests exploitation of PDF vulnerabilities to redirect users.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9979

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/aws?keyword=harrah+s+philadelphia+parking In PDF document text
    • https://dixitelenamipum.weebly.com/uploads/1/3/4/3/134380202/23e6010b9.pdfIn PDF document text
    • https://juluvolalo.weebly.com/uploads/1/3/4/4/134435755/3269975.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/f4374657-80f1-4c4c-922a-ed4d77a3641b/4106441651.pdfIn PDF document text
    • https://s3.amazonaws.com/mukut/81549442810.pdfIn PDF document text
    • https://s3.amazonaws.com/xisefowu/fapisarewetuluxema.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/49e273f6-70e1-409f-950b-ec898bb72855/it_cosmetics_bye_bye_redness_review.pdfIn PDF document text
    • https://s3.amazonaws.com/vososasoxumete/free_diamonds_for_hempire.pdfIn PDF document text
    • https://s3.amazonaws.com/wonoti/36937325521.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/a509dc01-329c-4238-9b0a-f87ea8252a6b/coreldraw_full_crack_kuyhaa.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_off0000c238.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC238 5244 bytes
SHA-256: 581a15b3ca9a3648597dacbf17dce217d6ad3462259cf6e5ecc1adf992155e1e
font_01_sfnt_off0000d403.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD403 10980 bytes
SHA-256: 6dde3a6ed6f60062d32a92139be9871ab18b4e7b7a3c01c9a3aa4fff31307ee3

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