Malicious PDF — malware analysis report

Static analysis result for SHA-256 5b48cc2e9e2cbcc5…

MALICIOUS

PDF

81.1 KB Created: 2021-06-06 12:05:50 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-29
MD5: 0a5a76d5166cf2f7a3a3cfb36627a936 SHA-1: ac43e6b40bfc3623cbbdc8666c4a80bfe0045dc6 SHA-256: 5b48cc2e9e2cbcc50858ead4fdfb4e35c3aeede4baed1923fa34124eef141aea
126 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

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 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 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://bologen.ru/123?utm_term=monster+legends+breeding+legendaries+guide PDF link annotation
    • https://jameguvifipud.weebly.com/uploads/1/3/4/7/134771166/1346608.pdfIn PDF document text
    • https://zizizibewanexu.weebly.com/uploads/1/3/0/7/130776642/5369491.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4372740/normal_60233a152ae2a.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4368756/normal_5feb985dab37a.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4446147/normal_5fe909fd1040e.pdfIn PDF document text
    • https://kivubuzer.weebly.com/uploads/1/3/5/3/135332577/tagebawadepiwas-jitabizeta-vosugoguziza.pdfIn PDF document text
    • https://zaboxunur.weebly.com/uploads/1/3/4/3/134369304/5690978.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4462345/normal_600b2b7b546a5.pdfIn PDF document text
    • https://bemilinup.weebly.com/uploads/1/3/4/3/134390274/4524482.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://detomipipu.pbworks.com/w/file/fetch/144510294/body_dysmorphic_disorder_treatment_centers.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/cb8b9c8a-710f-4ea4-8e3c-13128065e2e2/garmin_gps_12_xl_manual.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/83457b10-a59f-4c78-b33a-596481919e54/46167695183.pdfIn PDF document text
    • http://negaboxa.pbworks.com/f/49060556221.pdfIn PDF document text
    • http://kuzimotum.pbworks.com/f/mousetrap_play_cast.pdfIn PDF document text
    • http://redelaw.pbworks.com/w/file/fetch/144537651/how_to_fix_luxpro_thermostat.pdfIn PDF document text
    • http://jiboduxoguv.pbworks.com/w/file/fetch/144506199/tituga.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/cfb5ade3-77c8-4d87-81ca-682230a8c759/zivebekedilepepidi.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_off0000ff75.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFF75 5136 bytes
SHA-256: b86f12a7777d4988881d45cc2f2bf6d802b58ee28dce7638c6e41a59a21eb3a6
font_01_sfnt_off000110fb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x110FB 11220 bytes
SHA-256: 8f5a1e8087d0b40891f4034e3e04d770c84671d509679ca6d8c5a11103d78812

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