Malicious PDF — malware analysis report

Static analysis result for SHA-256 ead8fc2139c5ffd5…

MALICIOUS

PDF

72.4 KB Created: 2021-05-17 23:04:43 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-22
MD5: 7301614c7605ce8d545fbabe95257c72 SHA-1: dbbda3a746accca0a501a7b8df180669e073c7f8 SHA-256: ead8fc2139c5ffd5980c663e25b1bc509056ea12110807954655a40c83c4d3ff
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 0.9996

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=kuch+to+hai+tujhse+raabta+song+download+female+version PDF link annotation
    • https://static.s123-cdn-static.com/uploads/4450419/normal_5fe132499698f.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4409396/normal_602455daba759.pdfIn PDF document text
    • https://xewulatejema.weebly.com/uploads/1/3/5/3/135345986/1193646.pdfIn PDF document text
    • http://zomesotemaxage.66ghz.com/fudaxejupukalogixelelebu.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4483336/normal_604626dbe1b3c.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4450514/normal_6067702a992d2.pdfIn PDF document text
    • http://soxiwokix.iblogger.org/40843913824.pdfIn PDF document text
    • https://pifunugujo.weebly.com/uploads/1/3/4/4/134455612/3803108.pdfIn PDF document text
    • https://gegilegaf.weebly.com/uploads/1/3/1/3/131383227/7418867.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/9d493306-98d1-4e4f-bf95-8ec0b56eb081/88640850195.pdfIn PDF document text
    • http://fowagamop.rf.gd/36832598228.pdfIn PDF document text
    • http://jejemizon.rf.gd/methods_in_molecular_biophysics.pdfIn PDF document text
    • https://s3.amazonaws.com/zifilobesumafi/best_brainstorming_app_android.pdfIn PDF document text
    • https://s3.amazonaws.com/nowokil/journey_to_the_west_movie_download_in_tamil.pdfIn PDF document text
    • https://s3.amazonaws.com/febopa/list_of_the_most_common_irregular_verbs_in_english.pdfIn PDF document text
    • https://s3.amazonaws.com/fowikorejodi/halex_electronic_dartboard_with_parlor_cabinet.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/4a54b1c6-329a-4496-8b45-17058a8fe0ac/wukupudetanemu.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/189dcb2e-d725-475b-8acf-802e9050c485/23009879724.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/96c7ec0e-2f97-4799-b222-28b81c2fde2e/wamumojoxaludatosuz.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/ec32db12-a57c-4c93-9692-d5aa3fb14e1c/podam.pdfIn PDF document text
    • http://guwosimo.rf.gd/panduan_belajar_bahasa_inggris_untuk_pemula.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_off0000dc68.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDC68 5772 bytes
SHA-256: 3423e825d462d40ccc44bb9e75691fe6346e8edc43b3c10af8d528ace79462b5
font_01_sfnt_off0000f008.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF008 10304 bytes
SHA-256: c160bf656e12d713957a492abc5e77b51ce2f97dcecb4b8d40c903505ae96c17

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