Malicious PDF — malware analysis report

Static analysis result for SHA-256 cfd1c868fc79bdae…

MALICIOUS

PDF

67.6 KB Created: 2020-11-19 00:10:54 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-07
MD5: 8e9f2fccf224f8ecb524914b0d3772b9 SHA-1: 29e2be60443624dc06ca34783cba8d37e9327341 SHA-256: cfd1c868fc79bdae6eabf7e72213d82cdc6317314b7a9b166e1fb06366bbb89e
274 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

This PDF document is identified as malicious due to its use of a critical redirector link and a brand-impersonation credential phishing lure for Facebook. The document contains a large number of embedded links, many of which point to external PDF files, suggesting a link farm or SEO abuse tactic. The primary malicious URL identified is https://cctraff.ru/123?utm_term=similarities+between+photosynthesis+and+cellular+respiration, which redirects to a phishing page hosted on weebly.com.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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.
  • Brand-impersonation credential phishing lure critical SE_BRAND_CREDENTIAL_PHISH
    Document impersonates a well-known consumer brand and uses account-security / verification language ('unusual activity', 'account on hold', 'verify your account') to steer the reader to a credential-harvesting link. Corroborated by: action link to abused redirector https://dejolezeg.weebly.com/uploads/1/3/2/8/132815968/rogiw-nejabizo.pdf.
  • 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://cctraff.ru/123?utm_term=similarities+between+photosynthesis+and+cellular+respiration In PDF document text
    • https://cdn-cms.f-static.net/uploads/4377388/normal_5f8b263cd27d9.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366637/normal_5f883fac9597a.pdfIn PDF document text
    • https://dejolezeg.weebly.com/uploads/1/3/2/8/132815968/rogiw-nejabizo.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4377642/normal_5fa36daf6cc82.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4490251/normal_5faec2e018702.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4385412/normal_5f8f0005198ea.pdfIn PDF document text
    • https://munujagafunudo.weebly.com/uploads/1/3/0/8/130873736/17ed08f24c2.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366406/normal_5f94165870fe8.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4392661/normal_5f8eb5c5a3569.pdfIn PDF document text
    • https://rubazepenomul.weebly.com/uploads/1/3/4/3/134324915/129d1311b4d5ac5.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/zikeko/jijatoxural.pdfIn PDF document text
    • https://s3.amazonaws.com/jeworurowam/dialysis_diet.pdfIn PDF document text
    • https://s3.amazonaws.com/ruzumeb/mixed_factoring_practice_worksheet.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_off0000c9ef.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC9EF 5752 bytes
SHA-256: 78470eed3ea2a9cbf396ce7e11a96765a38129c2469c8361901b96ca702812c1
font_01_sfnt_off0000dd65.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDD65 10332 bytes
SHA-256: 1e62ecbb637294fdfca29e5c305138a7d8481d9ff4f0346abf7a4f7ab273ce63

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