Malicious PDF — malware analysis report

Static analysis result for SHA-256 ca1ec31c5214532e…

MALICIOUS

PDF

68.2 KB Created: 2020-12-01 19:52:28 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-11
MD5: aa80a3f9fd20ee121433cdc8aaf33db2 SHA-1: 06e9463e404012a73e35da38b11b945aa3f81f42 SHA-256: ca1ec31c5214532eecf7a079b4a866655dab5e4b3e3b87b92ec1d412df7972d5
244 Risk Score

Malware Insights

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

This PDF document was identified as malicious by multiple heuristics and a machine learning classifier, indicating it is likely a phishing or redirection attempt. It contains a large number of embedded URLs, forming a link farm designed to direct users to external sites, one of which is known malicious infrastructure. The document's content, though obfuscated, appears to be a lure related to a 'guide'.

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.
  • 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://traffmen.ru/123?utm_term=nythendra+normal+guide+pdf In PDF document text
    • https://kewalagaxed.weebly.com/uploads/1/3/4/8/134864879/4093807.pdfIn PDF document text
    • https://xikalevu.weebly.com/uploads/1/3/4/3/134319979/e17c7a3cf.pdfIn PDF document text
    • https://xusopurepaxa.weebly.com/uploads/1/3/4/1/134108567/5911773.pdfIn PDF document text
    • https://jamakebowixon.weebly.com/uploads/1/3/4/4/134477175/15ee3c0f53b3e.pdfIn PDF document text
    • https://zugixipenelir.weebly.com/uploads/1/3/4/5/134591811/8275568.pdfIn PDF document text
    • https://powedumino.weebly.com/uploads/1/3/4/3/134350182/wutetubitak.pdfIn PDF document text
    • https://moxitasa.weebly.com/uploads/1/3/1/4/131454719/9895647.pdfIn PDF document text
    • https://zabapekiji.weebly.com/uploads/1/3/4/4/134470890/1e7aa27b.pdfIn PDF document text
    • https://nenizuve.weebly.com/uploads/1/3/4/6/134615173/powojikulo_ruperojawi_simajijopikavu.pdfIn PDF document text
    • https://wapapoda.weebly.com/uploads/1/3/4/5/134581042/98d991def691f.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://static1.squarespace.com/static/5fbce344be7cfc36344e8aaf/t/5fbe59453c02f22b9ddc13cb/1606310213168/dr_glenn_rothfeld_cured.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc002e7e5c7695ca996b6a8/t/5fc3bc163570fb44d1751e94/1606663191931/des_destinees_de_lame.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc5386f3dfdd95b60f16c7a/t/5fc64b1afa04221c71f62287/1606830881470/75950972705.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/4ad7cd4f-07e5-4856-a713-57c700ae2348/70521782271.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_off0000cdbd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCDBD 5348 bytes
SHA-256: e96a266231c202036766b0065747b0c749aa4bee391ba0704023a572b1c5157d
font_01_sfnt_off0000dfd9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDFD9 10656 bytes
SHA-256: 3683b06c57c076deb5517f2f2d408a9eb9769ef7e7bb145c5e287e58fa797108

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