Malicious PDF — malware analysis report

Static analysis result for SHA-256 56b608ce3199c828…

MALICIOUS

PDF

81.4 KB Created: 2021-05-06 13:44:25 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-25
MD5: b5af18e5f26353aa0b7fc7da558cafed SHA-1: ae4d4f2671fec3191550e211afad045b5576ce44 SHA-256: 56b608ce3199c8286aa7ffccb88ff3eb008d2b3dd58152f50bfb7ce72f620d89
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 0.9997

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://jumiwimov.ru/strik?utm_term=caminar+sobre+las+aguas+biblia PDF link annotation
    • https://gelowabizum.weebly.com/uploads/1/3/1/3/131398428/751087.pdfIn PDF document text
    • http://lnstagram-copyright-supports.com/mijiwefepumofedebamixolafflhoz.pdfIn PDF document text
    • https://cdn.sqhk.co/jusulikipe/PGjbEgf/24289874733.pdfIn PDF document text
    • https://nisaxiguxizi.weebly.com/uploads/1/3/5/3/135306566/jerevusipu.pdfIn PDF document text
    • https://vojimefijizudi.weebly.com/uploads/1/3/4/3/134310580/sipaduwadur-zexaxopofol.pdfIn PDF document text
    • http://idealica-italy.site/23910696851nxw93.pdfIn PDF document text
    • http://xteenware.online/talking_about_leisure_activities_worksheetsknsji.pdfIn PDF document text
    • https://vurusewotuludi.weebly.com/uploads/1/3/0/7/130739344/8718963.pdfIn PDF document text
    • https://sobemifukoku.weebly.com/uploads/1/3/4/8/134887972/0fba512ae15fa.pdfIn PDF document text
    • http://cetakchantek.com/39494345210cwiz1.pdfIn PDF document text
    • http://particulieres-societegenerale.best/ayyappa_naa_songs_2019xiafw.pdfIn PDF document text
    • https://diritirafimiwav.weebly.com/uploads/1/3/4/3/134376035/giputofuduv-dixomajesete-peralemuxuziv.pdfIn PDF document text
    • https://moguvikob.weebly.com/uploads/1/3/0/8/130874292/166961fa058325.pdfIn PDF document text
    • https://cdn.sqhk.co/tidilotofuka/ge2Pzig/72224835376.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/tinivukedeta/74172090410.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/5752f742-51a4-4a2a-9e25-78efc12f3332/how_to_clean_black_and_decker_d2030_iron.pdfIn PDF document text
    • https://s3.amazonaws.com/tolivajupeku/how_to_export_database_in_oracle_11g_sql_developer.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/5cd2d907-c508-450c-9392-06bfa8aa9daa/14478475391.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/2cc82e2c-6851-4bf0-abe4-29efa5f08fb3/88398950370.pdfIn PDF document text
    • https://s3.amazonaws.com/febopa/nudul.pdfIn PDF document text
    • https://s3.amazonaws.com/risisipajole/tewen.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/87d89133-5a3b-420d-a5df-5ea481c208b8/how_to_become_a_good_med_surg_nurse.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_off0000ffba.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFFBA 5052 bytes
SHA-256: b375fc3a2e703a70f2c0c5384d245edf914654a60eff144105596313dd2a48dd
font_01_sfnt_off000110cb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x110CB 11552 bytes
SHA-256: 7fb8a7c11003ae50ad145bc3421da55888b1c71dfc2f411382410414f247a4e0

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