Malicious PDF — malware analysis report

Static analysis result for SHA-256 ff0637e96631115f…

MALICIOUS

PDF

66.7 KB Created: 2020-11-11 21:53:30 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-07
MD5: 396e7001226a929c19147a9c9dd5cb2d SHA-1: 8c3ca597df5e469a9ba6626821a4a4712814230b SHA-256: ff0637e96631115fd054d7dbbac32b34f314bf7d42b0ae804889aaf82d415c9b
222 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

The PDF contains numerous embedded links, with several pointing to known malicious redirector infrastructure and link farms. The heuristic 'PDF_MALICIOUS_REDIRECTOR_LINK' and 'PDF_SEO_LINK_FARM' indicate a strong attempt to redirect users to malicious sites. The ClamAV detection and ML classifier further support its malicious nature, suggesting it's a phishing or malware distribution lure.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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.
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • 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?utm_term=b.+ed+admit+card++2019+hp In PDF document text
    • https://ralevenewuw.weebly.com/uploads/1/3/4/4/134464099/7dfc1064abe.pdfIn PDF document text
    • https://xegoguvaposa.weebly.com/uploads/1/3/4/6/134677344/vojikar.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4447669/normal_5fa243caae94f.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4379718/normal_5f95ab4905bf5.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4452395/normal_5fa0fb11878ba.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4393890/normal_5f941b679acf1.pdfIn PDF document text
    • https://kizinuraximi.weebly.com/uploads/1/3/4/4/134446503/7330246.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4421960/normal_5f9f6c040e086.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/pazifetanegapu/vogosuvumigegukodilus.pdfIn PDF document text
    • https://s3.amazonaws.com/kulinisokakewi/sumerafarofazujogixo.pdfIn PDF document text
    • https://s3.amazonaws.com/pafiganovavi/25_kgy_minimum_dose.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_off0000c704.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC704 5668 bytes
SHA-256: 62bc797b75f0be798340a9def787cddab6e6387910b06779eb27b75fe024275b
font_01_sfnt_off0000da2a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDA2A 10144 bytes
SHA-256: 2cfed506060b763d43bf7a983a18e594958ac7eef93c550c0156af2e0ea54321

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