Malicious PDF — malware analysis report

Static analysis result for SHA-256 4f86ceff84986307…

MALICIOUS

PDF

78.7 KB Created: 2021-03-30 00:51:27 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-25
MD5: f9f5c957091550c798ebfbb6737b6c38 SHA-1: 59442f99e996a6d2325768cc1b46643a9ed7be33 SHA-256: 4f86ceff84986307ce0533c59a4eda5726de223534bd5aedc61fd68e72622bcb
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://jottigo.ru/strik?utm_term=dell+latitude+e6540+i5+4th+gen PDF link annotation
    • https://jonimewogil.weebly.com/uploads/1/3/1/8/131860125/81a6e50b824477.pdfIn PDF document text
    • http://bodipok.getenjoyment.net/539063258.pdfIn PDF document text
    • https://xuxasogunoniku.weebly.com/uploads/1/3/1/8/131856570/nuxusapejovetiz-ronudabekituwof-pedowef.pdfIn PDF document text
    • https://padilokemim.weebly.com/uploads/1/3/1/3/131381900/nufekurofizewo-xewuva.pdfIn PDF document text
    • https://mibubibot.weebly.com/uploads/1/3/1/8/131871690/jejepofawojigojaw.pdfIn PDF document text
    • https://nalatuzub.weebly.com/uploads/1/3/4/3/134324595/vemafemoti.pdfIn PDF document text
    • http://mokaxizekebade.scienceontheweb.net/neoclassicism_music.pdfIn PDF document text
    • https://fulimutalez.weebly.com/uploads/1/3/4/5/134599943/2353101.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4421788/normal_600bff279c047.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4407793/normal_6032e6d011c18.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://uploads.strikinglycdn.com/files/0496cac1-969e-4de3-ac63-8e467330eddb/what_is_the_gre_test_score_range.pdfIn PDF document text
    • https://e02212b7-c8ec-4bf5-ba3e-d68a1de675e0.filesusr.com/ugd/7f1d73_6f6a4338ec7040c8b1c68a4853f7181c.pdf?index=trueIn PDF document text
    • https://0f0532cb-4478-41f9-91a1-cf277c4732ec.filesusr.com/ugd/8acad3_8f1704322b784a56a22848c999fb9ee0.pdf?index=trueIn PDF document text
    • https://1b53f64c-3596-40ff-86ea-95cec8902569.filesusr.com/ugd/838e7e_63abb9660f6d4058844aaba5dd3531b0.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/3dfc2774-dda4-45fb-b645-e9c79ff1509c/the_ending_of_my_cousin_rachel_explained.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/b841ec02-85d8-4d92-af16-f24bfb522a61/jetavapekamimawiji.pdfIn PDF document text
    • https://edefa294-c65c-46c5-840b-8a4669b9fdfe.filesusr.com/ugd/e4a001_456d65b3984045969cdb9c1976860f1e.pdf?index=trueIn 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_off0000e425.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE425 5320 bytes
SHA-256: 4ae104ab7a495041d24e69d7d240ae334de2190c2174a182b23ff6f4ab1d8527
font_01_sfnt_off0000f649.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF649 23860 bytes
SHA-256: 3e7ef0b7a9870d27fb470f5aab6aa5fd7bc0e6f87f42f195974eadd288fe623e

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