Malicious PDF — malware analysis report

Static analysis result for SHA-256 56bc4a50a1df1ce2…

MALICIOUS

PDF

78.0 KB Created: 2021-01-15 07:50:14 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-23
MD5: 73e2e1ba5a4af628f96f2b071ba77573 SHA-1: 0cbfca1d601ded1d517b816d4d21b5ef27946c27 SHA-256: 56bc4a50a1df1ce2568343c2fbfaf13979fac6f28f3627f04f81e25d24b82ec0
184 Risk Score

Malware Insights

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

The PDF contains embedded links that redirect to malicious infrastructure, specifically identified by the heuristic PDF_MALICIOUS_REDIRECTOR_LINK. The document body, though heavily obfuscated, contains text related to real estate, suggesting a lure to a phishing or malware distribution site. The ML classifier and ClamAV detection strongly indicate malicious intent.

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
  • 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 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://cctraff.ru/wb?keyword=kodiak%20ak%20real%20estate%20for%20sale In PDF document text
    • https://fuwosijeven.weebly.com/uploads/1/3/0/7/130738701/nedebinonison.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4420617/normal_5fdf4b62ac63e.pdfIn PDF document text
    • https://napufifibadabe.weebly.com/uploads/1/3/1/4/131406817/347820.pdfIn PDF document text
    • https://zeteleginogegop.weebly.com/uploads/1/3/4/5/134526156/127475.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4464052/normal_5fdee7c866368.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4378405/normal_5fc3b2ba1c67b.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4383451/normal_5fc2460f54c87.pdfIn PDF document text
    • https://foniliwis.weebly.com/uploads/1/3/2/6/132695455/rivije.pdfIn PDF document text
    • https://botekajerojaj.weebly.com/uploads/1/3/4/7/134749353/dilugebulepij.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/topipovikapari/answer_love_yourself_chords.pdfIn PDF document text
    • https://s3.amazonaws.com/wuvepilamamuse/whatsapp_status_tamil_songs_new.pdfIn PDF document text
    • https://s3.amazonaws.com/divexikav/crtc_complaints_report.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_off0000f4ba.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF4BA 4932 bytes
SHA-256: ac5c321a4be83a5b229b08fbb8d815a7c6bff76c2fcb469ba96f8da76cfb35d8
font_01_sfnt_off0001058f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1058F 11028 bytes
SHA-256: 24c4d9dc07b56947a15837be66b6c57d95437c0ccc42cf3c309e674b26069134

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