Malicious PDF — malware analysis report

Static analysis result for SHA-256 ffd90098dacd37a7…

MALICIOUS

PDF

71.9 KB Created: 2020-12-27 16:14:40 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-12
MD5: 0ee4c199cd609dff7dd60aaf8107f6b4 SHA-1: 5a5729f992b018c1343df9d43996ef7e3c679bea SHA-256: ffd90098dacd37a7bfdf6917bce1ace3506594cdf817a4fbc48c7e99cb732218
126 Risk Score

Malware Insights

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

The PDF document was flagged by ClamAV as a phishing trojan and by an ML classifier as malicious. It contains numerous embedded URLs, including one pointing to 'trafffi.ru', suggesting a phishing or malware distribution attempt. The heuristic 'PDF_SEO_DISPOSABLE_LINK_FARM' indicates the PDF is designed to host multiple links on disposable hosting, further supporting a malicious intent.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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.
  • External URI info PDF_URI
    PDF contains an external URL action
  • 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://trafffi.ru/aws?utm_term=churchward+lorina+font+free PDF link annotation
    • https://static.s123-cdn-static.com/uploads/4378410/normal_5fc6c79805fd7.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4403417/normal_5f937cdc25268.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4391636/normal_5fda493a44efa.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4370284/normal_5fe0e4eef10f3.pdfIn PDF document text
    • https://rimenedefogifu.weebly.com/uploads/1/3/4/4/134466040/fadudo_kupimaf_tolimumopuvo.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4485942/normal_5fcebe42157a2.pdfIn PDF document text
    • https://wosumugip.weebly.com/uploads/1/3/4/8/134867897/2086579.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4365591/normal_5f88d1be33f7b.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4457302/normal_5fb286ed32f21.pdfIn PDF document text
    • https://fileduwefevara.weebly.com/uploads/1/3/4/3/134384607/figiva_riwimobusi_kumupokoxoj.pdfIn PDF document text
    • https://ziwupaxibupava.weebly.com/uploads/1/3/4/3/134379030/pigadapob.pdfIn PDF document text
    • https://takewinedol.weebly.com/uploads/1/3/4/7/134768260/meweporajulagogenage.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4463034/normal_5fd37aaa46f0d.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/wusigipufuvowix/fivegelibitomumimonididiz.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_off0000d8da.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD8DA 4928 bytes
SHA-256: a5fcbc1342f5bcad827529dc30c68fa87ad87a40fcd21d6dc7e1958e79aa77b6
font_01_sfnt_off0000e9a7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE9A7 12132 bytes
SHA-256: a3ca66d5f04f08141f161f93a6c9e56e2abf59afad73f54e84ce1307a7394718

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