Malicious PDF — malware analysis report

Static analysis result for SHA-256 a93da95d531ca373…

MALICIOUS

PDF

77.8 KB Created: 2021-03-16 00:27:32 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: d2006324763f4b6f6899fd395d19157f SHA-1: d06fc6a0c41e7e61eb0815dd761d33c0caeba6ee SHA-256: a93da95d531ca3732c248b9438442545f0bb2c8c22fb1493e5745b1e5e5971d1
96 Risk Score

Malware Insights

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

The file is a PDF containing multiple embedded URLs, with one prominent URL pointing to a suspicious domain. The ML classifier and ClamAV detection strongly indicate malicious intent, likely phishing or malware delivery. Although no scripts were explicitly extracted, the PDF structure and embedded URIs suggest an attempt to redirect the user to a malicious site.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

Heuristics 4

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://zajinet.ru/strik?utm_term=how+to+interpret+levene%2527s+test+spss
    • http://mibejar.sportsontheweb.net/cannondale_habit_2020.pdf
    • http://vepenuvix.mygamesonline.org/astronomy_facts.pdf
    • http://vosojivaru.mypressonline.com/how_to_refill_cartridge_hp_680.pdf
    • http://dasukuged.22web.org/decision_tree_examples_in_retail.pdf
    • http://sokegex.mywebcommunity.org/12498763147.pdf
    • http://xiruzox.mygamesonline.org/food_safety_temperature_chart_uk.pdf
    • https://static.s123-cdn-static.com/uploads/4478946/normal_5fcefb24931eb.pdf
    • http://penaxuwilamufo.iblogger.org/35601285040.pdf
    • https://cdn-cms.f-static.net/uploads/4421213/normal_604fdbb7bc6dd.pdf
    • http://torixobo.mypressonline.com/32581179997.pdf
    • http://fibipowokogo.sportsontheweb.net/vefavawujudarafavekebif.pdf
    • http://figimumagoko.mygamesonline.org/the_little_sas_book_6th_edition.pdf
    • http://kolekewoni.mywebcommunity.org/compound_interest_worksheet_gcse.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://s3.amazonaws.com/debiwelof/accrued_expenses_on_balance_sheet.pdf
    • https://uploads.strikinglycdn.com/files/703c8ea2-b682-4efd-b184-cc3da53db69f/honeywell_8000_service_manual.pdf
    • https://uploads.strikinglycdn.com/files/a6418687-3b42-4865-b2b3-d2a73681c0e2/47194140313.pdf
    • https://uploads.strikinglycdn.com/files/1d86a0a2-00dd-4581-9469-24dd5e801ead/30153963668.pdf
    • https://uploads.strikinglycdn.com/files/701f33de-ca56-409f-b862-3e312ec5855a/73942715168.pdf
    • http://fobonerenajob.epizy.com/skype_7._41._0.pdf
    • https://uploads.strikinglycdn.com/files/213c242b-9b74-40a0-a79f-4bee8345eb0a/disengagement_theory_explained.pdf
    • http://kewevagisugimuw.onlinewebshop.net/4809511742.pdf
    • https://s3.amazonaws.com/tugumeb/saxad.pdf
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/
    • http://scripts.sil.org/OFL

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000f35c.bin
2363804197907450c59dea7cc443ec3f94dffbb8b4ad3fa6ed29148bcf7f9499		 pdf-font-stream PDF embedded font (sfnt) at offset 0xF35C 4748 bytes
font_01_sfnt_off000103ae.bin
c239621c340932729bfe6f4648cd73592818073567398cc3f99a2997cf1e6507		 pdf-font-stream PDF embedded font (sfnt) at offset 0x103AE 11104 bytes

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