Malicious PDF — malware analysis report

Static analysis result for SHA-256 556484725b5f8d7c…

MALICIOUS

PDF

76.1 KB Created: 2021-01-08 18:16:51 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-27
MD5: 281cb3e76f398ccf8db83274522d7eb7 SHA-1: ee4e91d13f325ef7944b3874812ede35fb74fc69 SHA-256: 556484725b5f8d7c36117cc5d2c5fc450c5aee81a5601c53ee652fa8b3d8a23e
156 Risk Score

Malware Insights

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

The file was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. It contains a large number of external links, suggesting it's part of a link farm or phishing campaign. The PDF structure and embedded URLs point towards an attempt to redirect users to potentially harmful websites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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
  • 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.
  • 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://traffnew.ru/aws?utm_term=division+facts+worksheets+for+grade+3 PDF link annotation
    • https://cdn.sqhk.co/vuwonesi/JhgYNgf/oracle_colorshift_2._0_controller_installation.pdfIn PDF document text
    • https://cdn.sqhk.co/litalile/iacijKm/kof_2003_arcade_cheats.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4417652/normal_5fd7c36eb4cf0.pdfIn PDF document text
    • https://cdn.sqhk.co/jutusaxibu/Kgjm6jg/cut_em_off_tiktok_song.pdfIn PDF document text
    • https://lomameleni.weebly.com/uploads/1/3/4/5/134597964/5365975.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4476566/normal_5fbeb7df63a2e.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4392451/normal_5fdcf5bb6c938.pdfIn PDF document text
    • https://cdn.sqhk.co/jumupebuvi/iHdihhh/dadiwikafowapelim.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4382617/normal_5fa8953ba273f.pdfIn PDF document text
    • https://cdn.sqhk.co/disumuneriva/Pjbdicv/tiktok_apk_app_downloading.pdfIn PDF document text
    • https://cdn.sqhk.co/marixefe/gfjc3jc/tiziretesuzo.pdfIn PDF document text
    • https://resuzomesidi.weebly.com/uploads/1/3/4/7/134746605/jexizafav.pdfIn PDF document text
    • https://jotogenawe.weebly.com/uploads/1/3/1/4/131406354/d748a89.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4368746/normal_5fb35e0e5ff8b.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn 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_off0000ec13.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEC13 5632 bytes
SHA-256: 0556a18158fae27e26fe4e34a2715e03ed9dbea1ccf24d37fd64eaadd972d935
font_01_sfnt_off0000ff5a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFF5A 10568 bytes
SHA-256: 12aa11d3718534397355426ac8e20d47c2525155a7ae2d3107d47463b5e7aa1a

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