Malicious PDF — malware analysis report

Static analysis result for SHA-256 5dbdd572c10a4c85…

MALICIOUS

PDF

73.8 KB Created: 2020-12-18 00:17:27 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-04
MD5: 966b9bb1d1c0333d21366f6c8a32514a SHA-1: 111521e54dd38fa01126db2ca4948e29fd58471c SHA-256: 5dbdd572c10a4c85b550532f2defcc4183c54bb82cd1378bca1a462ff2580b57
186 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

This PDF document was flagged as malicious by ClamAV and an ML classifier. The file embeds a large number of external links characteristic of an SEO link farm. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 6

  • 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.
  • 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://trafficel.ru/123?utm_term=lancaster+estate+and+st+elizabeth+jamaica PDF link annotation
    • https://zavisedifigi.weebly.com/uploads/1/3/4/3/134316550/53a7e4bb765e.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4370078/normal_5fa2514c37a01.pdfIn PDF document text
    • https://nuvisinuxaxo.weebly.com/uploads/1/3/1/3/131383681/ad64b301b7.pdfIn PDF document text
    • https://worozimovazez.weebly.com/uploads/1/3/1/4/131406108/zepepenofoneduxeka.pdfIn PDF document text
    • https://sokuvotaboraj.weebly.com/uploads/1/3/0/7/130776263/mumezumis-jibukolumu-jogor.pdfIn PDF document text
    • https://metojonokodoto.weebly.com/uploads/1/3/4/8/134881876/fifenikuga_suvimizigifabu.pdfIn PDF document text
    • https://fimozafovobas.weebly.com/uploads/1/3/2/7/132741130/genajuxamesepita.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/pipaneku/gana_harish_ambedkar_song_mp4.pdfIn PDF document text
    • https://s3.amazonaws.com/vitelitubovuluj/disolijoken.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/51fbb118-a87e-4d2c-9ca2-de28e5d26770/0809_area_code.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/faa8c4d7-be8d-4c3d-82ce-1c4d01baa05e/morse_taper_dimensions_mt4.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/981bb893-f256-4133-ad81-9d44977c08de/genesee_county_register_of_deeds_recording_requirements.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/0bfd92c7-97e4-480c-9eb4-0cca2f553a04/39202807674.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_off0000e2f0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE2F0 5384 bytes
SHA-256: 4fb5955570558e664308babb5d2c3e9fc347cbe2095be93a9fc428a0f0f1c1fd
font_01_sfnt_off0000f51b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF51B 11064 bytes
SHA-256: 712c99843de1fc2674103de4e28fef79712966df6b2f4388dcc9056e3db1cced

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